Soluble salts are formed by reacting metal carbonates with acids. Give one other type of substance that can react with an acid to form a soluble salt.
Copper(II) nitrate contains the ions Cu2+\text{Cu}^{2+}Cu2+ and NO3−\text{NO}_3^-NO3−. Give the formula of copper(II) nitrate.
Describe a method to make pure, dry crystals of copper(II) sulfate from a metal oxide and a dilute acid.