Question

Question 35.
What happens when nitric acid is added to egg shell ?

Answer 1

Egg shells contain calcium carbonate $\left({\text{CaCO}}_3\right)$. When nitric acid is added to it, brisk effervescence due to the formation of ${\text{CO}}_2$ gas is observed. The reaction is:

${\text{CaCO}}_3\text{(s)}+2{\text{HNO}}_3\text{(aq)}\to {\text{Ca(NO}}_3{)}_2\text{(aq)}+{\text{CO}}_2\text{(g)}+{\text{H}}_2\text{O(l)}$