Question

Suatu basa lemah MOH (Kb = 10min5) memiliki pH= 10, molaritas basa lemah tsbt adalah..

Answer 1

PH = 10 maka pOH = 14 - pH = 14 - 10 = 4
[OH⁻] = 10⁻⁴
[OH⁻]  = √Kb x [MOH]
10⁻⁴    = √10⁻⁵ x [MOH]
(10⁻⁴)² = 10⁻⁵ x [MOH]
10⁻⁸    = 10⁻⁵ x [MOH]
10⁻⁸    = [MOH]
10⁻⁵
10⁻³    = [MOH]
jadi, molaritas MOH = 10⁻³ M