At 25 â°c, what is the hydroxide ion concentration, [ oh â ] , in an aqueous solution with a hydrogen ion concentration of [ h + ] = 5.0 ã 10 ^â 4 m?

[OH⁻] = 2.0 × 10⁻¹¹ M

Explanation:

Given data

We can calculate the concentration of hydroxide ion using the following expression.

[H⁺].[OH⁻] = Kw

where,

Kw is the ionic product of water (Kw = 1.0 × 10⁻¹⁴ at 25°C)

[H⁺].[OH⁻] = Kw

[OH⁻] = Kw/[H⁺]

[OH⁻] = 1.0 × 10⁻¹⁴/5.0 × 10⁻⁴

[OH⁻] = 2.0 × 10⁻¹¹ M

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