What is the action of heat on following salts? Explain with balanced equations.<br>a) $$\text{FeSO}_4 \xrightarrow{\Delta}$$ b) $$\text{AgNO}_3 \xrightarrow{\Delta}$$

PLACEHOLDER ANSWER - the answer is two equations. a) Green hydrated ferrous sulphate first loses its water, $$\text{FeSO}_4 \cdot 7\text{H}_2\text{O} \rightarrow \text{FeSO}_4 + 7\text{H}_2\text{O}$$, and on strong heating decomposes, $$2\text{FeSO}_4 \rightarrow \text{Fe}_2\text{O}_3 + \text{SO}_2 + \text{SO}_3$$, leaving a brown residue. b) Silver nitrate decomposes to the metal, $$2\text{AgNO}_3 \rightarrow 2\text{Ag} + 2\text{NO}_2 + \text{O}_2$$, giving brown fumes of $$\text{NO}_2$$.