Question

The pH of an acetic acid solution is 4.0. (10n= 1en).

Answer 1

Answer:

1. [H+] = 1 x 10^-4mol/L

2. [OH-] = 1 x 10^-10mol/L

Explanation:

1. From the question given, the pH is 4.0. We can obtain the value of the value of the hydrogen ion concentration [H+] as follows:

pH = —Log[H+]

4 = —Log[H+]

—4 = Log[H+]

Anti-log of —4

[H+] = 1 x 10^-4mol/L

2. Recall: [H+] x [OH-] = 1 x 10^-14

But [H+] = 1 x 10^-4mol/L

1 x 10^-4 x [OH-] = 1 x 10^-14

Divide both side by 1 x 10^-4mol/L

[OH-] = 1 x 10^-14/1 x 10^-4

[OH-] = 1 x 10^-10mol/L