Jee Main
Ionic Equilibrium
JEE Main 2022 (Online) 28th June Evening Shift
MCQ+4 / -12022
A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of \({{[C{H_3}C{H_2}CO{O^ - }]} \over {[C{H_3}C{H_2}COOH]}}\) required to make buffer is ___________.
Given : \({K_a}(C{H_3}C{H_2}COOH) = 1.3 \times {10^{ - 5}}\)