Domain: Chemistry / apparatus_usage

turn: 1
modality: text
input: Which of the following substances are consistent with the description: 'A colorless or white solid that is highly soluble in water, and its aqueous solution reacts with chloride ions to form a white precipitate that darkens upon exposure to light'?

Options:
A. Sodium chloride (NaCl)
B. Barium sulfate (BaSO₄)
C. Silver nitrate (AgNO₃)
D. Calcium carbonate (CaCO₃)
E. Potassium nitrate (KNO₃)
F. Lead(II) nitrate (Pb(NO₃)₂)
G. None of the above
output: answer: C, F

turn: 2
modality: image
input: It is known that the target substance is one of the correct options from the previous question and satisfies the following additional condition: 'This substance is photosensitive and must be stored in an opaque container to prevent decomposition.' Please generate an image showing this target substance stored correctly in its proper container and placed on a laboratory bench.
output: evaluation_points: 1. The container generated in the image is correct; it is indeed a brown glass reagent bottle.

The substance generated in the image is indeed silver nitrate (AgNO₃), and its color and appearance (colorless or white crystals) are consistent with the description 'colorless or white solid' from turn 1.

3. The substance is correctly contained within the brown glass bottle, with the bottle tightly sealed, and the amount of substance is appropriate (e.g., filling about half to two-thirds of the bottle).

4. The background is a clean laboratory bench scene.

turn: 3
modality: image
input: We will subsequently refer to the substance you identified earlier as the 'target substance'. The experimental instrument 'crucible' is used when strongly heating the target substance to thermally decompose it into its constituent elements. Please generate an image depicting the correct use of this instrument in this reaction scenario. The background is a clean laboratory bench.
output: evaluation_points: 1. The image correctly depicts the experimental instrument, a porcelain crucible, and its placement (e.g., on a clay triangle supported by an iron ring stand) is reasonable.

2. The reaction conditions shown (strong heating with a Bunsen burner flame directed at the base of the crucible) are consistent with the described 'thermal decomposition' reaction.

3. The use of the crucible complies with correct operational and safety standards: the crucible is clean and dry, it is handled with crucible tongs, and it is allowed to cool on a heat-resistant surface after heating.

The background is a clean laboratory bench scene, consistent with the background in the output image of turn 2.

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. A crucible is primarily used for evaporating solutions to dryness.
B. Crucibles can be made of materials like porcelain, quartz, or platinum, chosen based on the required heating temperature and chemical resistance.
C. When heating a substance in a crucible, it should always be covered with a watch glass to prevent splattering.
D. Crucible tongs should be used to handle a hot crucible, and the hot crucible should be placed on a heat-resistant mat or wire gauze to cool.
E. A crucible can be heated directly over the strongest part of a Bunsen burner flame.
F. After heating, a crucible should be immediately weighed on an analytical balance to obtain an accurate mass.
G. None of the above
output: answer: B, D, E