This question is about the preparation of soluble salts.
Soluble salts can be prepared by reacting metal hydroxides with acids. Give one other type of substance that can react with an acid to form a soluble salt.
Aluminium sulfate contains the ions Al3+\text{Al}^{3+}Al3+ and SO42−\text{SO}_4^{2-}SO42−. Give the formula of aluminium sulfate.
Describe a method to make pure, dry crystals of zinc sulfate from an insoluble metal carbonate and a dilute acid.