This question is about the preparation of soluble salts.
Soluble salts can be prepared by reacting metal carbonates with acids. Give one other type of substance that can react with an acid to form a soluble salt.
Sodium sulfate contains the ions Na+\text{Na}^+Na+ and SO42−\text{SO}_4^{2-}SO42−. Give the formula of sodium sulfate.
Describe a method to make pure, dry crystals of copper(II) sulfate from an insoluble metal oxide and a dilute acid.