Domain: Chemistry / apparatus_usage

turn: 1
modality: text
input: Which of the following substances are characterized by being a white or off-white solid at room temperature, capable of undergoing an exothermic reaction with water to produce a basic solution, and typically requiring storage in a sealed, moisture-proof container?
Options:
A. Sodium chloride (NaCl)
B. Calcium oxide (CaO)
C. Sulfur powder (S)
D. Sodium hydroxide pellets (NaOH)
E. Copper(II) sulfate pentahydrate (CuSO₄·5H₂O)
F. Magnesium ribbon (Mg)
G. None of the above
output: answer: BD

turn: 2
modality: image
input: It is known that the target substance is one of the correct options from the previous question and has the following additional property: it reacts vigorously with water, releasing a significant amount of heat. Please generate an image showing this target substance being 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 sealed glass jar or a desiccator, clearly labeled.

2. The substance generated is indeed calcium oxide (CaO), appearing as white or off-white lumps or coarse powder, consistent with the described solid state.

3. The substance is contained within a sealed, airtight container to prevent contact with atmospheric moisture, and the quantity shown is appropriate (e.g., filling about half to two-thirds of the container).

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

turn: 3
modality: image
input: We will subsequently refer to the substance you identified earlier as the 'target substance'. The thermal decomposition of calcium carbonate to produce this target substance requires the use of a laboratory instrument called a crucible. Please generate an image depicting the correct usage of this instrument during this reaction. The background is a simple laboratory bench.
output: evaluation_points: 1. The image correctly depicts a crucible, typically made of porcelain or similar refractory material, placed on a clay triangle supported by an iron ring and stand.

2. The reaction shown involves the heating of a white solid (calcium carbonate) in the crucible with a Bunsen burner, representing the thermal decomposition reaction (CaCO₃ → CaO + CO₂).

3. The crucible is used correctly: it is heated strongly, its lid may be slightly ajar to allow gas (CO₂) escape, and it is handled with crucible tongs. Safety is indicated (e.g., heat-resistant gloves nearby, clear workspace).

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 standards are correct:
Options:
A. This instrument is primarily used for holding liquids during titration experiments.
B. It is typically made of materials with high thermal resistance, such as porcelain or alumina.
C. When heating substances inside it, it should be placed directly on the wire gauze over a Bunsen burner.
D. It is appropriate to use beaker tongs for handling this instrument when it is hot.
E. After a high-temperature reaction, it should be allowed to cool to room temperature in a desiccator before weighing.
F. This instrument is commonly used for the ignition or strong heating of solid samples.
G. None of the above
output: answer: BEF