Question

3. Which of the following is the correct mathematical expression to use to

calculate the pH of a 0.10 Maqueous Ba(OH)2 solution at 25°C ?

Answer 1

The pH of a 0.10 Maqueous Ba(OH)2 solution at 25°C is 13.30

Step-by-step explanation:

The balanced equation is Ba(OH)2(s)→Ba2++2OH−

This indicates that the concentration is 0.2 M

We will find H+ ion concentration

As we know that

[H+][OH−]=1.0×10−14M

Given -

[OH−]=2.0×10−1M

Putting value of [OH-] in above equation we get -

[H+]=5.0×10−14M

pH=−log10[H+]

pH=−log10[5.0×10−14] = 13.30.