Answer:
7.08
Explanation:
First, we need to write a balanced dissociation equation equation for HCl. This is illustrated below:
HCl <==> H+ + Cl-
Now, we see clearly that 1mole of HCl produced 1mole of H+. This means that 8.4x10^-8M HCl will also produce 8.4x10^-8 M H+
Now, we can obtain the pH as follows:
[H+] = 8.4x10^-8 M
pH = —Log [H+]
pH = —Log 8.4x10^-8
pH = 7.08
