When do usually carbonates decompose?

Sep 24, 2015

When heated

Explanation:

Carbonates decompose usually when heated at high temperature.

For example, $C u C {O}_{3}$ decomposes as follows:

$C u C {O}_{3} \left(s\right) + H e a t \to C u O \left(s\right) + C {O}_{2} \left(g\right)$

This reaction is a good practice on reaction stoichiometry as you could see in the following video: