19.7k views
2 votes
Is the reaction between a chalk and hydrochloric acid always exothermic? How so?

User Jvalli
by
7.4k points

1 Answer

4 votes

The most part of Chalk is Calcium Carbonate (CaCO3). When this reacts with Hydrochloric acid, we have production of Carbon dioxide, Calcium Chloride and Water.

CaCO3 + 2HCl → CO2 + CaCl2 + H2O

User Alex Paramonov
by
8.4k points