pH = -log [H₃O⁺]

The pH level of a substance is equal to the negative log of the concentration of the hydronium ion, [H₃O⁺].

[H₃O⁺] × [OH^-]= 1.0 × 10^-14

In any substance, the product of the concentration of the hydronium ion, [H₃O⁺], and the concentration of the hydroxide ion, [OH^-], is always equal to 1.0 × 10^-14

Given a substance with a hydronium ion concentration of 2.5 x 10-5 (moles/L) Find the pH of the substance. Find the concentration (in moles/L) of the hydroxide ion. [OH-]

1.

Given a substance with a hydronium ion concentration, [H3O+], of 1.2 x 10-12 (moles/L) Find the pH of the substance. Find the concentration (in moles/L) of the hydroxide ion. [OH-]

2.

Given a substance with a hydronium ion concentration, [H3O+], of 1.0 x 10-7 (moles/L) Find the pH of the substance. Find the concentration ( in  moles/L) of the hydroxide ion, [OH-].

3.

Given a substance with [H3O+] = 5.0 x 10-3 (moles/L) Find the pH of the substance. Find the concentration (in moles/L) of the hydroxide ion, [OH-]

4.

Given a substance with a pH value of 8.80 Find [H3O+] Find [OH-]

5.

Given a substance with a pH value of 6.13 Find [H3O+] Find [OH-]

6.

Given a substance with a pH value of 1.23 Find [H3O+] Find [OH-]

7.

Given a substance with a hydroxide ion concentration, [OH-], of 5.6 x 10-4 (moles/L) Find [H3O+] Find the pH-]

8.

Given a substance with a hydroxide ion concentration, [OH-], of 1.7 x 10-10 (moles/L) Find [H3O+] Find the pH.

9.

Given a substance with a hydroxide ion concentration, [OH-], of 5.0 x 10-5 (moles/L) Find [H3O+]. Find the pH.

10.