Domain: Chemistry / apparatus_usage

turn: 1
modality: text
input: Which of the following substances are consistent with the description: 'A solid substance that is dark red or reddish-brown in color, insoluble in water and common organic solvents, and exhibits low reactivity under standard conditions'?
Options:
A. Iodine crystals (I₂)
B. Copper(II) oxide powder (CuO)
C. Sulfur powder (S)
D. Red phosphorus (P)
E. Potassium permanganate crystals (KMnO₄)
F. Sodium chloride (NaCl)
G. None of the above
output: answer: B, D

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 non-volatile, non-toxic, and stable in air at room temperature, but it must be stored in a sealed container to prevent contact with strong oxidizing agents.' Please generate an image depicting this target substance stored correctly in its appropriate container and placed on a laboratory bench.
output: evaluation_points: 1. The container depicted in the image is correct: a sealed, labeled glass reagent bottle or a tightly closed plastic container.

The substance depicted is indeed red phosphorus, showing a dark red or reddish-brown amorphous powder or granular solid, consistent with the description in Turn 1: 'A solid substance that is dark red or reddish-brown in color'.

3. The substance is correctly contained within the sealed container, with an appropriate fill level (e.g., not overflowing, leaving some headspace).

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

turn: 3
modality: image
input: We will refer to the substance you identified earlier as the 'target substance'. The preparation of this target substance from white phosphorus involves a heating process conducted under an inert atmosphere. This reaction requires the use of a laboratory instrument called a 'retort'. Please generate an image representing the correct setup for using this instrument in such a reaction. The background is a simple laboratory bench.
output: evaluation_points: 1. The image correctly depicts a retort, showing its characteristic round-bottomed flask body and a long, downward-curving neck leading to a receiver flask.

2. The reaction setup and conditions align with the described 'heating of white phosphorus under an inert atmosphere (e.g., carbon dioxide or nitrogen) to convert it to red phosphorus'.

The retort is used correctly: the round bottom is heated, the neck is angled downward for condensation and collection, and the setup is stable and secure, adhering to safety standards for handling air-sensitive materials, as required by the reaction described in Turn 3: 'heating of white phosphorus under an inert atmosphere (e.g., carbon dioxide or nitrogen) to convert it to red phosphorus'.

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

turn: 4
modality: text
input: Based on the instrument and operational scenario depicted in the input image, which of the following statements regarding the retort and its usage specifications are correct?
Options:
A. It is primarily used for simple distillation of liquids.
B. Its design, featuring a long, angled neck, facilitates the condensation and collection of volatile products or distillates.
C. It is the most suitable apparatus for performing titrations.
D. When heating the round-bottomed section, direct flame contact should be avoided; a sand bath or heating mantle is preferred for even heating.
E. It is commonly used for reactions that require the isolation of a product from the reaction mixture by distillation under atmospheric pressure.
F. The receiver flask at the end of the neck should always be left open to the atmosphere.
G. None of the above
output: answer: B, D, E