Domain: Chemistry / apparatus_usage

turn: 1
modality: text
input: Which of the following substances are consistent with the description: 'A white, crystalline solid at room temperature, soluble in water, and possessing a high melting point'?

Options:
A. Sodium Chloride (NaCl)
B. Iodine (I₂)
C. Calcium Carbonate (CaCO₃, chalk)
D. Sulfur (S₈)
E. Potassium Nitrate (KNO₃)
F. Carbon (C, graphite)
G. None of the above are correct.
output: answer: A, E

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: 'It is a common laboratory reagent that is hygroscopic and should be stored in a tightly sealed container to prevent caking.' 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 a wide-mouth glass reagent bottle with a plastic or ground glass stopper.

The substance generated is indeed Sodium Chloride (NaCl), appearing as a white, fine to coarse crystalline solid.

3. The substance is contained in the bottle in a dry, loose crystalline form, filled to an appropriate level (e.g., 1/2 to 3/4 of the bottle's volume). The bottle is tightly sealed.

4. The background is a clean, uncluttered laboratory bench scene.

turn: 3
modality: image
input: We will refer to the substance you identified previously as the 'target substance'. The preparation of this target substance via neutralization of sodium hydroxide with hydrochloric acid requires the use of a laboratory instrument: the evaporating dish. Please generate an image depicting the correct use of this instrument in the final stage of this preparation reaction. The background is a clean laboratory bench.
output: evaluation_points: 1. The image correctly depicts an evaporating dish, a shallow, porcelain dish with a pouring lip, placed on a wire gauze atop a tripod stand over a Bunsen burner (or hot plate).

2. The reaction/scene is consistent with the final evaporation step to obtain solid sodium chloride from its aqueous solution, following the neutralization reaction (NaOH + HCl → NaCl + H₂O). The dish should contain a clear or slightly milky liquid (concentrated salt solution) being heated.

The evaporating dish is used correctly: it is placed on a tripod with wire gauze for even heat distribution. The Bunsen burner flame (if shown) is adjusted to a gentle, steady heat.

4. The background is a clean, uncluttered 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 regarding this instrument and its usage norms are correct.

Options:
A. It is primarily used for rapid, vigorous boiling of large volumes of liquid.
B. Its wide, shallow shape provides a large surface area to facilitate evaporation.
C. It is typically made of borosilicate glass to withstand rapid temperature changes.
D. When heating it directly with a flame, it should always be placed on a clay triangle, not wire gauze.
E. After use, especially with salt solutions, it should be rinsed promptly to prevent residue from baking onto the surface.
F. It can be used as a lid to cover beakers during reactions.
G. None of the above are correct.
output: answer: B, E