Calcium carbonate and copper sulfate are each mixed into a beaker of water.
After a few minutes the calcium carbonate settles on the bottom of its beaker,
while the copper sulfate stays dissolved. Which statement is true about this
experiment?
A. Copper sulfate is a solvent.
B. Calcium carbonate in water is a solution.
C. Copper sulfate in water is a solution.
D. Calcium carbonate is a solvent.