Domain: Chemistry / lab_accident

turn: 1
modality: text
input: Which of the following substances are white, odorless solids at room temperature, soluble in water, and produce an alkaline solution upon dissolution? (Select all that apply)

A. Sodium chloride (NaCl)
B. Anhydrous sodium carbonate (Na2CO3)
C. Calcium oxide (CaO)
D. Copper(II) sulfate pentahydrate (CuSO4·5H2O)
E. None of the above
output: answer: BC

turn: 2
modality: image
input: The target substance is one of the correct options from the previous question. It is a white, anhydrous powder that is hygroscopic (absorbs moisture from air) and must be stored in a sealed container to prevent caking. Please generate an image showing this target substance stored correctly in its appropriate container on a laboratory bench.
output: evaluation_points: 1. The container generated is correct: a wide-mouth, glass reagent bottle with a plastic or ground-glass stopper, clearly labeled.

The substance generated is indeed anhydrous sodium carbonate (Na2CO3), appearing as a fine, white, free-flowing powder, consistent with the description in Turn 2 input: 'a white, anhydrous powder'.

3. The substance is shown contained within the sealed bottle. The bottle is shown upright on the bench, not overfilled, indicating proper storage to prevent moisture absorption.

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

turn: 3
modality: image
input: We will now refer to the substance you identified as the 'target substance'. This target substance reacts vigorously with dilute hydrochloric acid, producing a colorless gas. Please generate the state of the experimental setup on the bench during this normal reaction, ensuring all apparatus, material states, and reaction phenomena are reasonable and self-consistent.
output: evaluation_points: 1. The experimental apparatus is selected, connected, and used correctly: a beaker or conical flask containing the target substance, with dilute acid being added from a dropper or via a delivery tube, suitable for a gas-evolving reaction.

2. The target substance, anhydrous sodium carbonate (Na2CO3), is correctly generated as a white powder at the bottom of the reaction vessel.

The target substance, anhydrous sodium carbonate (Na2CO3), is correctly generated as a white powder at the bottom of the reaction vessel, consistent with its description as a white powder from Turn 2 input.

4. The reaction phenomenon matches the description: vigorous effervescence (bubbling) is visible as the colorless carbon dioxide gas is released.

5. The image background is a laboratory bench.

turn: 4
modality: text
input: If, in the normal reaction described above, the dilute hydrochloric acid were mistakenly replaced with concentrated sulfuric acid, the most likely accident to occur is:

A. A violent, exothermic reaction causing spattering of hot acid.
B. The production of a toxic, colored gas (chlorine).
C. The formation of an insoluble, colored precipitate.
D. No significant reaction would occur; the mixture would remain inert.
E. None of the above.
output: answer: A

turn: 5
modality: image
input: Please generate the scene of the experimental accident described in the previous question, and show the correct method for handling this accident.
output: evaluation_points: 1. The image correctly depicts the aftermath of the accident: a beaker or flask with contents showing signs of a violent reaction (e.g., spattered liquid, possible heat distortion, unsettled mixture).

2. The image shows the correct accident handling method: a laboratory technician is shown safely diluting the spilled or reacting mixture by carefully adding a large volume of cold water from a beaker or wash bottle from a safe distance, or the scene shows the area has been flooded with water for dilution.

3. The background and other unrelated elements remain consistent with the reaction image generated earlier (same bench style, similar apparatus).

The background and other unrelated elements remain consistent with the laboratory bench scene from Turn 2 output image.