What is the pH of 10-9 M HCl?
Here , [H+] for acid is < 10 -7 { which is not possible }
so,
total [H+] = 10 -7 + 10 -9
= 1.01 x 10 -7
Thus, pH = - log [H+]
= 6.99
The pH of a solution of KOH is 10. Calculate the hydroxyl ion concentration.
given,
pH = 10
i.e. - log [ H+] = 10
thus, [H+] = 1 x 10 -10
we know, [H+] [OH-] = 10 -14
SO, [OH-] = 1 X 10 -4 mole/litre