Answer:
2.22×10⁻⁹ M
Explanation:
Applying,
[OH⁻][H⁺] = 1×10⁻¹⁴................... Equation 1
Where [OH⁻] = Hydroxyl ion concentration, [H⁺] = Hydrogen ion concentration.
make [OH⁻] the subject of the equation,
[OH⁻] = 1×10⁻¹⁴/[H⁺]............... Equation 2
From the question,
Given: [H⁺] = 4.51×10⁻⁶ M
Substitute into equation 2
[OH⁻] = 1×10⁻¹⁴/4.51×10⁻⁶
[OH⁻] = 2.22×10⁻⁹ M
