Question

A solution has a hydrogen ion concentration of [H+] = 4.6 x 10 -3 M.

What is the hydroxide ion concentration [OH-] of this solution?

Answer 1

[OH⁻] = 2.2 x 10⁻¹²

Step-by-step explanation:

(Step 1)

Calculate the pH.

pH = -log[H⁺]

pH = -log[4.6 x 10⁻³]

pH = 2.34

(Step 2)

Find the pOH.

pH + pOH = 14

2.34 + pOH = 14

pOH = 11.66

(Step 3)

Calculate the [OH⁻].

[OH⁻] = 10^(-pOH)

[OH-] = 10^(-11.66)

[OH⁻] = 2.2 x 10⁻¹²