Domain: Chemistry / precipitation

turn: 1
modality: image
input: Please generate a concise chemical laboratory bench scene: A substance is contained in a <small, clean, colorless glass reagent bottle>. The substance must have the following observable appearance: <colorless or white, solid, in the form of small, transparent or translucent crystals, with a shiny or lustrous surface>. The background should be a <laboratory bench environment with basic equipment outlines, avoiding clutter and text labels>.
output: evaluation_points: 1. The generated container is correct and is indeed a <small, clean, colorless glass reagent bottle>.

2. The color and appearance (powder/crystals/lump/solution, etc.) of the target substance conform to '<colorless or white, solid, small transparent/translucent crystals, shiny/lustrous>'. The substance should not be depicted as a colored powder or a liquid.

3. The substance is correctly contained in the bottle (no special storage requirements like being kept under oil are needed here), and the amount is appropriate (e.g., filling about half the bottle).

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 highly soluble in water. 2. Its aqueous solution conducts electricity well. 3. It decomposes upon exposure to light, turning grayish-black.>, which of the following substances is it most likely to be?

Options:
A. Sodium Chloride (NaCl)
B. Copper(II) Sulfate Pentahydrate (CuSO4·5H2O)
C. Silver Nitrate (AgNO3)
D. Calcium Carbonate (CaCO3)
E. None of the above
output: answer: C

turn: 3
modality: image
input: Please generate a test tube containing an aqueous solution prepared from the target substance you identified in the previous context. After adding reagent B = <Dilute Hydrochloric Acid (HCl)> dropwise to the tube, a precipitate forms inside. Describe the precipitate using its visual characteristics (do not name it directly or indirectly). The background is a laboratory bench.
output: evaluation_points: 1. The test tube and the volume of liquid are reasonable, with the liquid level at about one-third of the tube's height.

2. The color of the precipitate satisfies '<white>'. The precipitate should not be any other color.

3. The state of the precipitate satisfies '<a curdy or clumpy solid, not a fine powder or gel>'. It should be clearly distinct from the solution.

4. The solution color is reasonable. After the precipitation reaction, the solution should appear '<colorless and clear>', as the supernatant liquid above the white precipitate.

The image background is a simple laboratory bench, consistent with the background in the turn 1 output image.

turn: 4
modality: text
input: Based on the precipitation phenomenon observed in the input image, if an 'excess' amount of reagent C = <Concentrated Ammonia Solution (NH3·H2O)> is added next and the mixture is allowed to stabilize, what is the most likely observation?

Options:
A. The white precipitate dissolves completely, resulting in a colorless, clear solution.
B. The white precipitate remains unchanged, settling at the bottom of the tube.
C. The white precipitate changes color to blue.
D. Gas bubbles are released from the precipitate.
E. None of the above
output: answer: A