Domain: Chemistry / apparatus_usage

turn: 1
modality: image
input: Please generate a concise chemical laboratory bench scene: A substance is contained in a reagent bottle. This substance must have the following observable appearance: It is a pale green, crystalline solid. The background should be a laboratory environment with a bench and basic equipment outlines, avoiding clutter and text labels.
output: evaluation_points: 1. The container generated in the image is correct and is indeed a reagent bottle.

2. The color and appearance (pale green, crystalline solid) of the target substance conform to the description.

3. The substance is appropriately contained in the bottle, with a suitable amount shown.

4. The background is a simple laboratory bench scene.

turn: 2
modality: text
input: Based on the appearance of the substance in the input image, and given that this substance is known to have the following properties: (1) It is soluble in water, and its aqueous solution is acidic. (2) It can be oxidized by atmospheric oxygen in aqueous solution, turning from pale green to yellow-brown. (3) It is commonly used as a reducing agent and a source of Fe²⁺ ions. Please select from the following options the substance it most likely is:

Options:
A. Copper(II) Sulfate Pentahydrate (CuSO₄·5H₂O)
B. Sodium Chloride (NaCl)
C. Iron(II) Sulfate Heptahydrate (FeSO₄·7H₂O)
D. Potassium Permanganate (KMnO₄)
E. None of the above
output: answer: C

turn: 3
modality: image
input: We will subsequently refer to the substance you identified earlier as the 'target substance'. When preparing a standard solution of this target substance by dissolving a weighed mass of its crystals in water, the laboratory instrument 'volumetric flask' is used. Please generate an image depicting the correct use of this instrument in this scenario. The background is a simple laboratory bench.
output: evaluation_points: 1. The image correctly depicts a volumetric flask, and its placement on the bench is reasonable.

The scene shows the preparation of a standard solution by dissolving pale green crystals in water, which aligns with the described process. The pale green color of the crystals must match the color of the substance described in Turn 1 input text (pale green).

3. The use of the volumetric flask conforms to correct usage, placement, and safety standards (e.g., proper handling, adding solvent to the mark, mixing by inversion).

4. The background is a simple laboratory bench scene.

turn: 4
modality: text
input: Based on the instrument and operational scene in the input image, determine which of the following statements about this instrument and its usage specifications are correct:

Options:
A. This instrument is primarily used for precise measurement of liquid volumes.
B. It is suitable for heating solutions directly over an open flame.
C. When preparing a standard solution, the solute should be dissolved directly inside this instrument.
D. The final adjustment to the calibration mark should be made using a wash bottle or dropper to add solvent dropwise.
E. After adding solvent, the solution must be thoroughly mixed by inverting the stoppered flask several times.
F. The calibration mark indicates the volume the flask contains when filled to that line at a specified temperature (usually 20°C).
G. None of the above
output: answer: A, D, E, F