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Question

Chemistry Question on Acids and Bases

The pHpH value of 1×104MNaOH1 \times 10^{-4} \,M \,NaOH solution is

A

4

B

10

C

6

D

between 6-7

Answer

10

Explanation

Solution

1×104MNaOH=1×104M[OH]1 \times 10^{-4} M \,NaOH =1 \times 10^{-4} M \left[ OH ^{-}\right] pOH=log[OH]pOH =-\log \left[ OH ^{-}\right] =log(1×104)=4=-\log \left(1 \times 10^{-4}\right)=4 pH=14pOHpH =14- pOH =144=10=14-4=10