Question

Calculate the pOH of a 9.03x10-5 M solution of NaOH.

Answer 1

     NaOH --->      Na⁺ +        OH⁻
1 mol                                 1 mol
9.03x10⁻⁵ M                     9.03x10⁻⁵ M

pOH=- log[OH⁻]
pOH = -log( 9.03x10⁻⁵ )=4.04
pOH=4.04