Tim Cook answered
Copper carbonate (CuCO3) mixed with sulphuric acid (H2SO4) produces copper sulphate (CuSO4).
Uses for Copper Sulphate
The chief use for copper sulphate is in agriculture, where it is used as part of fungicides and insecticides. Farmers also use copper sulphate in sheep dip, and to dress sides and sterilize soil. Elsewhere, copper sulphate can be used to eradicate algae blooms, and can help control diseases such as malaria and bilharzia.
Perhaps the most everyday use for copper sulphate is in bookbinding glue, where it helps prevent the binding from becoming infested with insects.
Learn more on how to make copper sulphate from copper carbonate and sulphuric acid by watching this film: