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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts3 Marks
Question
What happens when nitric acid is added to egg shell?
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Answer

When nitric acid is added to egg shell, it dissolves egg shell. Egg shell is composed of calcium carbonate which dissolves in nitric acid. The reaction between nitric acid and calcium carbonate yields calcium nitrate and carbon dioxide gas.
$CaCO _3(s)+2 HNO _3( aq ) \rightarrow Ca \left( NO _3\right)_2( aq )+ CO _2(g)+ H _2 O ( I )$

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