Equilibrium Question 498
Question: If the dissociation constant of an acid HA is $ 1\times {10^{-5}}, $ the $ pH $ of a 0.1 molar solution of the acid will be approximately [NCERT 1979]
Options:
A) Three
B) Five
C) One
D) Six
Show Answer
Answer:
Correct Answer: A
Solution:
$ [{H^{+}}]=\sqrt{Kc}=\sqrt{{10^{-5}}\times 0.1}={10^{-3}},,pH=3 $ .
