<span lang="EN-GB

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

We know that : -

p^H = - log₁₀ [H⁺]

⇒ p^H = - log₁₀ [1 X 10^-8 ]

⇒ p^H = -[ log₁₀1 + log₁₀10^-8 ]

Now, log₁₀1 = 0

⇒ p^H = -[0 + (-8) log₁₀10 ]

Now, log₁₀10 = 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.