id int64 2 200 | question stringlengths 160 520 | answer stringclasses 4
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2 | Model the kinetic dissolution of 1 mole of Calcite (CaCO3) in a hydrothermal solution at 100°C, pe of 4 and pH 5, containing 0.5 mmol/kgw of dissolved inorganic carbon and 1 mmol/kgw of Manganese. The simulation should track the reaction over 1000 seconds, broken into 100 discrete time steps. Use a kinetic rate law ba... | C |
7 | Model the kinetic dissolution of 1 mole of Calcite (CaCO3) in a hydrothermal solution at 100°C, pe of 4 and pH 5, containing 0.5 mmol/kgw of dissolved inorganic carbon and 1 mmol/kgw of Manganese. The simulation should track the reaction over 1000 seconds, broken into 100 discrete time steps. Use a kinetic rate law ba... | C |
9 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | A |
10 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | C |
11 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | A |
12 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | B |
13 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | C |
14 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | D |
15 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | B |
16 | 1 mole of Calcite (CaCO3) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area... | B |
17 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | A |
18 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | D |
19 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | C |
20 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | C |
21 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | B |
23 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | D |
24 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | A |
25 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | D |
26 | Model the kinetic dissolution of 1 mole of Albite over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmosphere... | A |
27 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 20°C, what is the pH... | A |
28 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 180°C, what is the p... | D |
29 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 200°C, how many mole... | B |
30 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 100°C, how many mole... | D |
31 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 100°C, what is the i... | C |
32 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 160°C, how many spec... | C |
33 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 160°C, what is the s... | A |
34 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 20°C is there more o... | C |
35 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 200°C what is the de... | B |
36 | Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.
At 200°C what is the lo... | D |
38 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | B |
39 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | A |
40 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | B |
41 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | A |
42 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | B |
43 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | A |
44 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | D |
45 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | B |
46 | Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial p... | A |
47 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
What is the pH of the solution?
A. 5.506
B. 5.509
C. 5.507
D. 5.508 | B |
49 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
What is the specific conductance of the solution?
A. 124109
B. 124104
C. 124108
D. 124103 | C |
50 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
What is the molality of Al (OH) 4- in the solution?
A. 2.243e-06
B. 2.242e-06
C. 2.241e-06
D. 2.240e-06 | B |
51 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
Is there more moles of Fe (2) or Fe (3) in solution?
A. Fe (2)
B. Fe (3)
C. Same
D. N/A | B |
52 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
Are there fewer species of Fe (2) or Fe (3) in solution?
A. Fe (2)
B. Fe (3)
C. same
D. n/a | A |
53 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
How many species of Al are in solution?
A. 5
B. 6
C. 8
D. 4 | C |
55 | Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.
What is the saturation index of Mirabilite?
A. -1.92
B. -1.89
C. -1.91
D. -1.90 | D |
57 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
What is the pH?
A. 7... | A |
58 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
What is the specific co... | D |
59 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
What is the ionic stren... | B |
60 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
Which mineral dissolved... | B |
61 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
Which mineral had net p... | A |
62 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
How many moles of talc ... | D |
63 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
How many species of C (... | B |
65 | Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2].
What is the saturation ... | C |
67 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the pH?
A. 0.944
B.... | C |
68 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the saturation index of... | B |
69 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the pe of the solution?... | A |
70 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the specific conductanc... | C |
71 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the alkalinity?
A. -... | A |
72 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
How many species of Fe (3) are ... | A |
73 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the saturation index of... | D |
74 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the molality of H+ in t... | A |
75 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
What is the molality of S (6) i... | B |
76 | Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.
Are there more moles of Fe (2) ... | B |
77 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | D |
79 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | C |
80 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
How many sp... | A |
81 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
Is the mola... | A |
82 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | B |
83 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | D |
84 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | A |
85 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What was th... | B |
86 | Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4), 10 moles of Carbon Dioxide (CO2), and 5 moles of Ammonia (NH3).
What is the... | D |
87 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the pH?
A. 7.493
B. 7.494
C. 7.491
D. 7.492 | D |
88 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the specific conductance?
A. 44
B. 46
C. 47
D. 48 | B |
89 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the pe?
A. 3.506
B. 3.509
C. 3.504
D. 3.508 | D |
90 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the ionic strength?
A. 8.538e-05
B. 8.539e-05
C. 8.537e-05
D. 8.536e-05 | A |
91 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the log IAP of Chrysotile?
A. 21.13
B. 21.15
C. 21.14
D. 21.18 | C |
92 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
How many species of Si are present?
A. 1
B. 2
C. 3
D. 5 | C |
93 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the saturation index of Chalcedony?
A. -2.33
B. -2.37
C. -2.30
D. -2.36 | D |
94 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the saturation index of quartz?
A. -2.20
B. -2.24
C. -2.21
D. -2.28 | C |
95 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
What is the molality of MgOH+?
A. 6.818e-06
B. 6.814e-06
C. 6.816e-06
D. 6.817e-06 | C |
96 | Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.
Is there more Mg or Si in solution?
A. Mg
B. Si
C. Same
D. N/A | A |
97 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the molality of Alkalinity?
A. 4.995e-03
B. 4.993e-03
C. 4.997e-03
D. 4.999e-03 | C |
98 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the molality of Ca?
A. 2.496e-03
B. 2.498e-03
C. 2.495e-03
D. 2.494e-03 | A |
99 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the total carbon?
A. 5.280e-03
B. 5.284e-03
C. 5.285e-03
D. 5.287e-03 | D |
100 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the electrical balance?
A. -5.431e-06
B. -5.435e-06
C. -5.436e-06
D. -5.438e-06 | A |
101 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the specific conductance?
A. 464
B. 468
C. 473
D. 463 | D |
102 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the saturation index of Aragonite?
A. 0.40
B. 0.39
C. 0.42
D. 0.41 | A |
103 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the saturation index of O2 (g)?
A. -37.20
B. -37.18
C. -37.19
D. -37.21 | C |
104 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the activity of CO2?
A. 3.193e-04
B. 3.199e-04
C. 3.198e-04
D. 3.197e-04 | D |
105 | Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.
What is the activity of H2?
A. 7.079e-27
B. 7.070e-27
C. 7.073e-27
D. 7.075e-27 | A |
106 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the molality of Cl?
A. 5.707e+00
B. 5.710e+00
C. 5.709e+00
D. 5.708e+00 | A |
107 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the pH of the mixture?
A. 6.732
B. 6.730
C. 6.733
D. 6.731 | C |
109 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
what is the electrical balance?
A. -5.703e+00
B. -5.707e+00
C. -5.709e+00
D. -5.710e+00 | B |
110 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the viscosity of the mixture?
A. 0.89229
B. 0.89829
C. 0.89429
D. 0.89329 | D |
111 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the specific conductance of the mixture?
A. 263753
B. 263768
C. 263761
D. 263760 | D |
112 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the saturation index of H2O (g)?
A. -1.55
B. -1.51
C. -1.54
D. -1.53 | A |
113 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the activity of H+ in the mixture?
A. 1.850e-07
B. 1.852e-07
C. 1.851e-07
D. 1.855e-07 | C |
114 | Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.
What is the molality of HCl?
A. 1.286e-08
B. 1.285e-08
C. 1.283e-08
D. 1.280e-08 | A |
116 | Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.
What is the pH of the final solution?
A. 1.013
B. 1.010
C. 1.019
D. 1.018 | A |
PHREEQC-MCQ: verified items and model predictions
Four-option multiple-choice items that require running PHREEQC, a geochemistry simulator from the USGS, together with every per-item model prediction from Same Simulation, Different Evidence: Where Retrieved Tool Output Costs LLM Agents Accuracy.
The items come from PHREEQC-MCQ-200. This release contains the 158 items whose answer keys were reproduced by re-executing PHREEQC 3.8.6; all main-text results of the paper use these items.
The agent harness, the frozen PHREEQC database, and full agent trajectories are on GitHub: grenadeComing/same-simulation-different-evidence.
Load
from datasets import load_dataset
items = load_dataset("grenadeComing/same-simulation-different-evidence", "items", split="test")
predictions = load_dataset("grenadeComing/same-simulation-different-evidence", "predictions", split="test")
Fields
items (158 rows)
| Field | Meaning |
|---|---|
id |
Item id (numbering of the original 200-item pool) |
question |
The prompt given to models, options included |
answer |
Correct option letter |
predictions (8,851 rows: one per run and item)
| Field | Meaning |
|---|---|
run |
Run directory under result/ in the GitHub repository |
model |
Model |
setting |
agent, no_tools, or paired_replay |
condition |
Raw100k, TOC, Grep, Hybrid, TOC+Report, TOC+Round, Direct, or CoT |
repeat |
Repeat index (paired replay only) |
item_id |
Item id, matching items.id |
prediction |
Predicted option letter; null when the agent gave no answer |
answer |
Correct option letter |
correct |
Whether the prediction is correct; missing answers count as incorrect |
Conditions: Raw100k returns the simulator report inline, truncated to 100k characters; TOC returns an index of report sections that the agent reads by line range; Grep gives the agent a regular-expression search tool; Hybrid returns the report inline when it fits and the TOC otherwise; TOC+Report and TOC+Round add an instruction to answer from the report or to round to the options' precision; Direct and CoT use no tools.
Rows are stored per run, and several conditions have more than one run. The TOC results on the 33 long-output items come from the custom/pool200_tocfix_uncapped_capaffected45_* runs, which replace the TOC reruns on those items; the run map in the GitHub README lists every run.
Citation
@article{zhang2026samesimulation,
title = {Same Simulation, Different Evidence: Where Retrieved Tool Output Costs {LLM} Agents Accuracy},
author = {Zhang, Ke and Chundur, Sahchit and Owusu, Jerry Peprah and Abdolhosseini Qomi, Mohammad Javad and Raissi, Maziar},
journal = {arXiv preprint arXiv:2610.26836},
year = {2026}
}
@article{zhang2026phreeqcmcq,
title = {{PHREEQC-MCQ-200}: A Diagnostic Benchmark for Tool-Augmented Scientific Simulator Agents},
author = {Zhang, Ke and Chundur, Sahchit and Abdolhosseini Qomi, Mohammad Javad and Raissi, Maziar},
journal = {arXiv preprint arXiv:2607.00436},
year = {2026}
}
License
The items are released under CC BY 4.0. Model predictions are outputs of the evaluated models; their use is also subject to each provider's terms.
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