Acid Base PH, POH

Question

The pH of an aqueous solution is measured as 1.98. Calculate the [H3O^+].

Calculate the [OH−].

Answer 1

pH = 1.98

10^-1.98 = [H₃O⁺] = 1.05 x 10^-2

pH + pOH = 14

1.98 + pOH = 14

pOH = 12.02

10^-12.02 = [OH^-] = 9.55 x 10^-13