Answer to Question #206487 in General Chemistry for Adi

Question

an aqua solution of metal nitrate p reacts with sodium bromide solution to form whites insoluble compound O which is not used in photography. O on electrolysis it undergoes decomposition reaction to form metal present in p along with reddish brown gas. identify p and o write the chemical reaction and type of chemical reaction

Answer 1

An aqueous solution of silver nitrate reacts with sodium bromide solution forming a yellow ppt compound, silver bromide that is utilized in photography.

The reaction tends to be double displacement type of reaction in which mutual exchange of ions takes place within reactants.

Equation

2Ag(NO₃) _(aq) + 2NaBr_(aq) ---> 2AgBi_(s) + NaNO_{3 (aq)}

Elements

P - Silver nitrate

Q - Silver bromide used in photography

When silver nitrate is exposed to the sun it decomposes to brown bromine gas and silver nitrate

2AgBr --> 2Ag_(s) + Br_{2 (g)}