Question
A student is investigating two clear colorless liquids, liquid A and liquid B in order to classify them. The student heats both liquids by placing each liquid in a beaker on a hot plate and recording observations.
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Liquid Observations
A The liquid completely boils away leaving a white solid.
B The liquid completely boils away leaving no residue behind.
Which BEST classifies liquids A and B using the model and the student's observations?
A.
Liquid A is a heterogenous mixture because when heated it separated into a gas and solid; liquid B is a mixture because it didn't appear to separate into different substances.
B.
Liquid A is a homogeneous mixture because when heated it separated into a gas and liquid; liquid B is a mixture because it was separated from the solution by the process of evaporation.
C.
Liquid A is a homogeneous mixture because when heated it separated into a gas and solid; liquid B is an element or compound because it didn't appear to separate into different substances.
D.
Liquid A is a heterogeneous mixture because when heated it separated into a gas and a liquid; liquid B is an element or compound because it was separated from the solution by the process of evaporation.
image
Liquid Observations
A The liquid completely boils away leaving a white solid.
B The liquid completely boils away leaving no residue behind.
Which BEST classifies liquids A and B using the model and the student's observations?
A.
Liquid A is a heterogenous mixture because when heated it separated into a gas and solid; liquid B is a mixture because it didn't appear to separate into different substances.
B.
Liquid A is a homogeneous mixture because when heated it separated into a gas and liquid; liquid B is a mixture because it was separated from the solution by the process of evaporation.
C.
Liquid A is a homogeneous mixture because when heated it separated into a gas and solid; liquid B is an element or compound because it didn't appear to separate into different substances.
D.
Liquid A is a heterogeneous mixture because when heated it separated into a gas and a liquid; liquid B is an element or compound because it was separated from the solution by the process of evaporation.
Answers
GPT-5 mini
C
Liquid A behaved like a solution (a homogeneous mixture): the solvent boiled away as a gas and a dissolved solid remained as a white residue. Liquid B showed no residue when the liquid evaporated, consistent with being a pure substance (an element or compound) under these observations.
Liquid A behaved like a solution (a homogeneous mixture): the solvent boiled away as a gas and a dissolved solid remained as a white residue. Liquid B showed no residue when the liquid evaporated, consistent with being a pure substance (an element or compound) under these observations.