The insoluble reactant chosen depends upon the particular salt required.
For example, copper does not react with dilute acids, so this metal cannot be used. On the other hand, sodium is too reactive to be used safely.
As the reaction between metals and acids produces flammable hydrogen, chemists usually make salts by reacting a metal oxide or a metal carbonate with an acid.
The table shows some examples of the salts produced by different combinations of insoluble reactants and acids.
|Hydrochloric acid||Sulfuric acid||Nitric acid|
|Copper oxide||Copper chloride||Copper sulfate||Copper nitrate|
|Aluminium hydroxide||Aluminium chloride||Aluminium sulfate||Aluminium nitrate|
|Zinc carbonate||Zinc chloride||Zinc sulfate||Zinc nitrate|
To make a soluble salt from an acid and an insoluble reactant:
Give the names of two substances that react to make zinc sulfate.
Sulfuric acid and zinc or zinc oxide or zinc carbonate or zinc hydroxide.