Answer to Question #346125 in Chemistry for Razman

Question

What is the PH of a solution whose hydroxide

-3

ion (OH) is 0.003 moldm

Answer 1

Solution:

[OH⁻] = 0.003 mol dm⁻³ = 0.003 M

We can convert between [OH⁻] and pOH using the following equation:

pOH = −log[OH⁻] = −log(0.003) = 2.52

For any aqueous solution at 25^∘C:

pH + pOH = 14

pH = 14 − pOH = 14 − 2.52 = 11.48

pH = 11.48

Answer: pH = 11.48