JEE Main Chemistry question

Chemistry Equilibrium JEE Main

For a weak acid is 4.8. What will be the ratio of concentration of acid and salt in pH 5.8 solution?

(A)10
(B)3
(C)9
(D)0.1Correct

Answer: (D)

Solution

pH=pK_a+\log([salt]/[acid])\Rightarrow5.8=4.8+\log([salt]/[acid])\Rightarrow[salt]/[acid]=10\Rightarrow[acid]/[salt]=0.1.

Question ID VK-135734