done by only bryan( wallace, zhan peng and jia sheng did not do anything)

Observation when carbonate is added to acid
Effervescence of a colourless, odourless gas, white precipitate is formed.
Lime water
White precipitate is formed
Damp litmus paper
Blue damp litmus paper turns red, red damp litmus paper remains same
1. Salt, carbon dioxide and water
2 acid + metal carbonate>salt + carbon dioxide + water
4. Bubble the gas into lime water. I f white precipitate if formed, the gas is carbon dioxide.
5a. acidic
5b. Bubble the sample of air through aqueous sodium hydroxide. As sodium hydroxide is an alkaline, carbon dioxide, an acidic gas, will react with the aqueous sodium hydroxide.

Calcium carbonate + Hydrochloric acid à calcium chloride + carbon dioxide + water

Sodium carbonate + hydrochloride acid à sodium chloride + carbon dioxide +water

Potassium carbonate + hydrochloride acid à potassium chloride + carbon dioxide +water

Calcium carbonate + nitric acid à calcium nitrate + carbon dioxide + water

Sodium carbonate + nitric acid à sodium nitrate + carbon dioxide + water

Potassium carbonate + nitric acid à potassium nitrate + carbon dioxide + water

Calcium carbonate + sulfuric acid à calcium sulphate + carbon dioxide + water

Sodium carbonate + sulfuric acid à sodium sulphate + carbon dioxide + water

Potassium carbonate + sulfuric acid à potassium sulphate + carbon dioxide + water

Sodium carbonate + ethanoic acid à  sodium ethanoic + carbon dioxide + water

Potassium carbonate + ethanoic acid à potassium ethanoic + carbon dioxide + water

Calcium carbonate + ethanoic acid à calcium ethanoic + carbon dioxide + water