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# The hydrogen ion concentration of a solution is 1 X 10 -8 M

i) What is the PH of the solution?

ii) What is the POH of the solution?

iii) Is the given solution, acidic or basic?.

Answer :

(i) We are given that the hydrogen ion concentration of a solution is = [H^{+}] = 1 X 10^{-8} M

We know that : -

p^{H} = - log_{10} [H^{+}]

⇒ p^{H} = - log_{10} [1 X 10^{-8} ]

⇒ p^{H} = -[ log_{10}1 + log_{10}10^{-8} ]

Now, log_{10}1 = 0

⇒ p^{H} = -[0 + (-8) log_{10}10 ]

Now, log_{10}10 = 1

⇒ p^{H} = -[0-8 ]

⇒ p^{H} = -[-8]

⇒ p^{H} = 8

Hence, the p^{H} of the solution is 8.

(ii) According to relation we have : -

P^{H} + p^{OH} = 14

⇒ 8 + p^{OH} = 14

⇒ p^{OH} = 14 – 8

⇒ p^{OH} = 6

Hence, the pO^{H} of the solution is 6.

(iii) As the p^{H} of the solution is 8 which is greater than 7. Hence, the given solution is basic.

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