Question

What happen when 1. Dilute hcl acid is added to solid sodium carbonate. 2. Quick lime is treated with water. 3. Sodium chloride is added lead nitrate solution and also write the chemical equation in each case

Answer 1

1. HCl+ NaCO3 - HCO3 + NaCl
2. CaCO3 + H2O - Ca(OH)2
3. NaCl + PbNO3 - NaNO3 + PbCl

Answer 2

Answer: The equations are given below.

Explanation:

The balanced chemical equations for the reactions are given below.

For 1: When dilute Hydrochloric acid reacts with sodium carbonate, it results in the formation of sodium chloride salt, carbon dioxide gas and water. The chemical equation for the reaction is:

$2HCl+Na_2CO_3\rightarrow 2NaCl+CO_2+H_2O$

For 2: When quick lime (calcium oxide) is treated with water, it results in the formation of slaked lime (calcium hydroxide). The chemical equation for the reaction above is:

$CaO(s)+H_2O(l)\rightarrow Ca(OH)_2(s)$

For 3: When sodium chloride reacts with lead nitrate, it results in the formation of sodium nitrate and lead chloride. This reaction is known as double displacement reaction because exchange of ions is taking place. The chemical equation for the above reaction is:

$2NaCl(aq.)+Pb(NO_3)_2(aq.)\rightarrow PbCl_2(s)+2NaNO_3(aq.)$