What is the hydronium ion concentration in a solution of HCl that has a pH of 4.65?

x 10" M

n =

What is the hydroxide ion concentration in a solution of NH3 with a pOH of 4.65?

x 101 M

n =

1) [H3O+] = 2.24 * 10^-5 M

2) [OH-] = 2.24 * 10^-5 M

Explanation:

Step 1: Data given

pH + pOH = 14

pH = - log [H+]

Step 2:

What is the hydronium ion concentration in a solution of HCl that has a pH of 4.65?

pH = 4.65

-log [H+] = 4.65

[H+] = 10^-4.65 M

[H+] = 2.24 * 10^-5 M

[H+] = [H3O+] = 2.24 * 10^-5 M

Step 3:

What is the hydroxide ion concentration in a solution of NH3 with a pOH of 4.65?

pOH = 4.65

-log[OH-] = 4.65

[OH-] = 10^-4.65 M

[OH-] = 2.24 * 10^-5 M