Question

(iii)
lime water + carbon dioxide →​

Answer 1

test for carbon dioxide

Answer 2

Answer:

Ca(OH)2(aq) + CO2(g) -------> CaCO3(s ppt.) + H2O(l)

Explanation:

Chemical Formula of lime water is: Ca(OH)2 (It is also known as Calcium Hydroxide and it is also a strong base)

Chemical Formula of Carbon dioxide is: CO2

This reaction in usually used for test for presence of carbon dioxide as passing carbon dioxide through lime water turns it milky. It is a double displacement or precipitation reaction.

Ca(OH)2(aq) + CO2(g) -------> CaCO3(s ppt.) + H2O(l)

Here,

aq means aqueous solution (Solution that is mixed with water).

g stands for gas.

s ppt. is Solid precipitate formed.

l stands for water.

Observations in this reaction:

The solution will turn milky due to the fact that calcium carbonate is a white precipitate.