Equilibrium Question 525
Question: The hydrogen ion concentration of 0.001 $ MNaOH $ solution is [AFMC 1983]
Options:
A) $ 1\times {10^{-2}}mole/litre $
B) $ 1\times {10^{-11}}mole/litre $
C) $ 1\times {10^{-14}}mole/litre $
D) $ 1\times {10^{-12}}mole/litre $
Show Answer
Answer:
Correct Answer: B
Solution:
0.001 M $ NaOH $ means $ [O{H^{-}}]={10^{-3}} $ ; $ pOH=3 $
$ pH+pOH=14;pH=14-3 $
$ pH=11 $ ; $ [{H^{+}}]={10^{-11}} mole/litre^{-1}$
