MCQ
What will be the $H^+$ ion concentration when $4g\, NaOH$ is dissolved in $1000\, ml$ solution
- A$10^{-1}$
- ✓$10^{-13}$
- C$10^{-4}$
- D$10^{-10}$
✓
Answer
Correct option: B.
$10^{-13}$
b
$OH ^{-} \Rightarrow \frac{\text { mole }}{\text { vol }}=\frac{4 / 40}{1000 \,m }=\frac{1 / 10}{1}=\frac{1}{10}=10^{-1}$
$OH ^{-} \Rightarrow \frac{\text { mole }}{\text { vol }}=\frac{4 / 40}{1000 \,m }=\frac{1 / 10}{1}=\frac{1}{10}=10^{-1}$
$P ^{ OH }=1$
$P ^{ H }=14- P ^{ OH }=14-1=13$
$P ^{ H }=13$
$\left( H ^{+}\right)=10^{-13}$
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