Question

what ia the pH of 10-4 M NaOH solution ​

Answer 1

Answer:

POH =-log[OH]-pOH=4

pH=14-pOH

=10

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Answer 2

Given :

Concentration of NaOH in the solution = $10^-^4$ M

To Find :

pH of $10^-^4$ M NaOH solution

Solution :

pOH of a solution is the negative logarithm (where base is 10) of its OH⁻ ion concentration. Therefore,

pOH = - Log [OH⁻]

        = - Log [10⁻⁴]

        =  4

We know,

     pH + pOH = 14

⇒    pH + 4      = 14

∴        pH         = 10    

Therefore, the pH of 10⁻⁴ M NaOH solution is 10.