Equilibrium Question 527
Question: $ H_4{O^{+}} $ of a solution is 4. The hydroxide ion concentration of the solution would be [NCERT 1981; CBSE PMT 1991; MP PMT 1994]
Options:
A) $ {10^{-4}} $
B) $ {10^{-10}} $
C) $ {10^{-2}} $
D) $ {10^{-12}} $
Show Answer
Answer:
Correct Answer: B
Solution:
pH $ =4 $
$ pH+pOH=14 $ ; $ pOH=14-pH $
$ pOH=14-4=10 $ ; $ [O{H^{-}}]={10^{-10}} $ M
