Equilibrium Question 357
Question: 0.2 molar solution of formic acid is ionized 3.2%. Its ionization constant is [MP PMT 1991]
Options:
A) $ 1\times {10^{-12}} $
B) $ 2.1\times {10^{-4}} $
C) $ 1.25\times {10^{-6}} $
D) $ 1\times {10^{-14}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ K_{a}=C{{\alpha }^{2}}=0.2\times {{( \frac{32}{100} )}^{2}}=2.048\times {10^{-4}} $ .
