1. Topic 9
Reactions of
Acids

2. Acids and Metal Carbonates Experiment
Aim: To investigate the reaction between metal carbonate and acids.
Method:
Limewater
Acid
Metal Carbonate

3. Effect of gas produced on
Results:
Effect of gas produced on
Reaction
Limewater
Sodium Carbonate + ________
Copper carbonate + _________
Conclusion:
Carbonates react with acids to produce CO2(g) which is an acidic gas.

4. Acids and Metal Carbonates
Carbonate rocks are used in a lot of buildings. When acid rain falls on these buildings the acid reacts with the carbonate in a neutralisation reaction.
Metal Carbonate +Acid  Salt+Water+Carbon dioxide
Calcium carbonate  Calcium chloride+
+Hydrochloric acid water+carbon dioxide
CaCO3 + HCl  CaCl2 + H2O + CO2

5. Examples
Calcium carbonate  Calcium nitrate + water Nitric acid + carbon dioxide
CaCO3 + 2HNO3  Ca(NO3)2 + H2O + CO2

6. Magnesium carbonate+  Magnesium chloride
hydrochloric acid water +carbon dioxide
MgCO3 + HCl  MgCl2 + H2O + CO2
In these reactions the H+ of the acid reacts with the CO3- ions of the metal carbonate to form water and carbon dioxide. The H+ ion is replaced by the metal ion: Neutralisation reaction.