Copper(II) sulfate is an example of a substance that dissolves in water. Copper(II) sulfate is an ionic compound with the chemical formula CuSO4 and when it is added to water it dissociates into

Question

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ions. Students used both copper sulfate crystals and copper sulfate powder in this experiment on the rate of dissolving. Choose the two statements that represent valid conclusions based on the student data?
Responses
A Agitation of the powder allows fresh solvent molecules to continually be in contact with the solute.Agitation of the powder allows fresh solvent molecules to continually be in contact with the solute.
B Regardless of the state of copper sulfate, an increase temperature resulted in an increased dissolving rate.Regardless of the state of copper sulfate, an increase temperature resulted in an increased dissolving rate.
C The smaller the solute particles the more energy they have. Increased energy results in shorted dissolving time.The smaller the solute particles the more energy they have. Increased energy results in shorted dissolving time.
D A given quantity of solute dissolves faster when it is ground into small particles because more surface area is exposed.

Answer 1

A Agitation of the powder allows fresh solvent molecules to continually be in contact with the solute.
D A given quantity of solute dissolves faster when it is ground into small particles because more surface area is exposed.