A buffer solution has equal volumes of 0.2M NH4OH and 0.02 M NH4 Cl. The pkb of the base is 5. The pH is

Question

A buffer solution has equal volumes of 0.2M NH4OH and 0.02 M NH4 Cl. The pkb of the base is 5. The pH is (A) 10 (B) 9 (C) 4 (D) 7

Tardigrade Admin · Accepted Answer

pOH = p Kb+ log ([ salt ]/[ base ]) (Henderson's equation) =5+ log (0.02/0.2)=5+ log (1/10) =5+(-1)=4 pH =14- pOH =14-4=10

Q. A buffer solution has equal volumes of $0.2 M N H_{4} O H$ and $0.02 M N H_{4} Cl$ . The $p^{kb}$ of the base is $5$ . The $p H$ is