Question

Write down some points about the test that is used to detect carbon dioxide along with the reaction. (3 marks)

Answer 1

1. Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. (1 mark)
2. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white. (1 mark)
3. The reaction is as given below.

$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+{\mathrm{CO}}_2\to {\mathrm{CaCO}}_3+H_{2}O$ (1 mark)