Viết công thức của các muối sau: potassium sulfate, sodium hydrogensulfate, sodium hydrogencarbonate, sodium chloride, sodium nitrate, calcium hydrogenphosphate, magnesium sulfate, copper(II) sulfate.

Potassium sulfate: K2SO4;

Sodium hydrogensulfate: NaHSO4;

Sodium hydrogencarbonate: NaHCO3;

Sodium chloride: NaCl;

Sodium nitrate: NaNO3;

Calcium hydrogenphosphate: CaHPO4;

Magnesium sulfate: MgSO4;

Copper(II) sulfate: CuSO4.