What reaction occurs when calcium carbonate is treated (separately) with (i) nitric acid, and (ii) sulfuric acid?

1 Answer
Mar 4, 2017

Each acid liberates carbon dioxide............

Explanation:

With nitric acid:

CaCO3(s)+2HNO3(aq)Ca(NO3)2(aq)+CO2(g)+H2O(l)

So we would see fizzing (i.e. the evolution of the gas), and the dissolution of solid carbonate. Calcium nitrate is soluble.

With sulfuric acid:

CaCO3(s)+2H2SO4(aq)Ca(SO4)2(s)+CO2(g)+H2O(l)

Again the gas would be liberated, but calcium sulfate is only very moderately soluble in aqueous media. I would expect to see the solid salt to go up, and then reprecipitate as the sulfate.

Nothing of what I write here is a substitute for actually doing the experiment in a laboratory, and observing and recording the results.