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
State Ostwald's dilution law.
the mathematical expression representing the variation of the degree of dissociation with dilution for weak electrolytes is called OStwald's dilution law.
mathematical exp, K = Id 2 / (1-Id ) V