Acid Bases Reactions _ A-level Chemistry AQA

So the first type of acid reaction we’re going to look at is neutralisation.

Neutralisation

Neutralisation is a type of reaction where an acid and a base react together to make a salt and water. If we use a strong acid and a strong base for this, we’re going to form water and a neutral salt, that’s why its called neutralisation.

Reactions with Carbonates

We are going to look at acid’s reactions with the common things it reacts with look at how we can write ionic equations for this and make sure we know what the general products are for these reactions. So firstly, we are going to cover solid carbonates.

  • Solid carbonates

    • Write out the full equation: Acid is hydrochloric acid, the solid carbonate is calcium carbonate, (a carbonate is something that contains CO3) Acid and salt carbonate react to form the salt calcium chloride, they also form carbon dioxide and finally they form water.

      • 2HCl+(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l)

    • Write as separate aqueous ions and cancel, (turn it into an ionic equation):

      • 2HCl+(aq) + 2Cl-(aq) + CaCO3(s) → Ca2+(aq) + 2Cl(aq) + CO2(g) + H2O(l)

    • Write out the ionic equation:

      • 2HCl+(aq)+ CaCO3(s) → Ca2+(aq) CO2(g) + H2O(l)