Q17 of 45 Page 2

What happens when nitric acid is added to an egg shell?

Since egg shell is made of calcium carbonate. And we know that when calcium carbonate (CaCO3) reacts with nitric acid (HNO3) then carbon dioxide, calcium nitrate and water are formed. So same reaction happens when nitric acid is added to an eggshell.


CaCO3 + 2HNO3→ Ca(NO3)2 + CO2 + H2O

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(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?


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