4.5 predict the products of reactions between dilute hydrochloric, nitric and sulphuric acids; and metals, metal oxides and metal carbonates (excluding the reactions between nitric acid and metals)

With metal oxides...

Acid + metal oxide ---> salt + water

Most metal oxides are bases (a base is a substance that can neutralise an acid), this means they will react with acids to form a salt and water. If the acid is hydrochloric acid, the salt will be a metal chloride, if the acid is sulphuric acid, the salt will be a metal sulfate, if the acid is nitric acid, the salt will be a metal nitrate. For example...

hydrochloric acid + copper oxide ---> copper chloride + water
2HCl + CuO ---> CuCl₂ + H₂O


sulphuric acid + zinc oxide ---> zinc sulphate + water
H₂SO₄ + ZnO ---> ZnSO₄ + H₂O


nitric acid + copper oxide ---> copper nitrate + water
2HNO₃ + CuO ---> Cu(NO₃)₂ + H₂O


With metal carbonates...

Acid +  metal carbonate ---> salt + water + carbon dioxide

The same with metal oxides, the salt produced will depend on the acid you use. For example...

hydrochloric acid + sodium carbonate ---> sodium chloride + water + carbon dioxide
2HCl + Na₂CO₃ ---> 2NaCl + H₂O + CO₂


sulphuric acid + calcium carbonate ---> calcium sulphate + water + carbon dioxide
H₂SO₄ + CaCO₃ ---> CaSO₄ + H₂O + CO₂


nitric acid + calcium carbonate ---> calcium nitrate + water + carbon dioxide

2HNO₃ + CaCO₃ ---> Ca(NO₃)₃ + H₂O + CO₂