Question

Which of the following aqueous solution can not be used as buffer solution ?
(1) NH4OH + NH4Cl
(2) HCN + KCN
(3) AgCN
(4) NH4I

Answer 1

HEY BUDDY HERE IS UR ANSWER !!


Buffer solution is a solution which is composed . NH4OH and NH4Cl. This buffer solution composed of weak base ( NH4OH) 

》》 BE BRAINLY 《《

Answer 2

$\mathrm{NH}_{4} \mathrm{OH}+\mathrm{NH}_{4} \mathrm{Cl}$is cannot be used as buffer solution.

Explanation:

• A buffer solution is the solution which is the change of pH only slightly when a small amount of “a strong acid” or “strong base” has been added.

• A buffer solution contains significant concentration of both, ‘a weak acid’ and its ‘conjugate base or weak base’ and its conjugate acid.

• $\mathrm{NH}_{4} \mathrm{OH}$ is a ‘weak base’ and  $\mathrm{NH}_{4} \mathrm{Cl}$ is not a conjugate acid.

• Therefore,$\mathrm{NH}_{4} \mathrm{OH}+\mathrm{NH}_{4} \mathrm{Cl}$ is cannot be used as buffer solution.