What volume of Hclo4

Question

what volume in mL of 9.2M Hclo4 would be required to make 500 mL of a solution with a pH of 3.20

Answer 1

HClO₄ is a strong acid, so the pH will be the negative log of the [H⁺] concentration.

In this case, pH = 3.2 indicates a [H⁺] of 1x10^-3.2 M = 6.3x10^-4 M

Now we can use V1M1 = V2M2 to find the volume of 9.2 M HClO₄ to make 500 ml of 6.3x10^-4 M HClO4

(x ml)(9.2 M) = (500 ml)(6.3x10^-4 M)

x = 0.0342 mls of 9.2 M HClO₄ is needed