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Question

Chemistry Question on Equilibrium

The hydroxyl ion concentration in a solution having pHpH value 33 will be

A

10−1110^{-11}

B

10−710^{-7}

C

10−310^{-3}

D

10−1410^{-14}

Answer

10−1110^{-11}

Explanation

Solution

Hydrogen ion concentration of solution having pHpH value 3=10−33=10^{-3}
Now, [OH−][H+]=10−14[OH^{-}] [H^{+}] =10^{-14}
⇒[OH−]=10−14[H+]\Rightarrow [OH^{-}] = \frac{10^{-14}}{[H^{+}]}
=10−1410−3=\frac{10^{-14}}{10^{-3}}
=10−11=10^{-11}