How to calculate pH of different types of solutions?

1.	How to calculate pH of different types of solutions?
Answer» Different Types of solutions : (a) Strong acid solution : (i) If concentration is greater than 10^–6 M. In this case H⁺ ions coming from water can be neglected, so [H⁺] = normality of strong acid solution (ii) If concentration is less than 10^–6 M In this case H⁺ ions coming from water cannot be neglected. So [H⁺] = normality of strong acid + H⁺ ions coming from water in presence of this strong acid. (b) Strong base solution : Calculate the [OH^– ] which will be equal to normality of the strong base solution and then use K_w = [H⁺ ] × [OH^–] = 10^–14, to calculate [H⁺]

Answer»

Different Types of solutions :

(a) Strong acid solution :

(i) If concentration is greater than 10^–6 M.

In this case H⁺ ions coming from water can be neglected, so [H⁺] = normality of strong acid solution

(ii) If concentration is less than 10^–6 M

In this case H⁺ ions coming from water cannot be neglected. So [H⁺] = normality of strong acid + H⁺ ions coming from water in presence of this strong acid.

(b) Strong base solution :

Calculate the [OH^– ] which will be equal to normality of the strong base solution and then use K_w = [H⁺ ] × [OH^–] = 10^–14, to calculate [H⁺]

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