Question

A mixture of copper sulfate and water is heated, leaving a residue of copper sulfate in the container. Which method was used to separate the mixture?
A. filtration
B. evaporation
C. chromatography
D. distillation

Answer 1

The correct method used to separate a mixture of copper sulfate and water by heating, leaving a residue of copper sulfate, is B. evaporation. This process involves heating the mixture to evaporate the water, leaving the solid copper sulfate behind as a residue.