Calculate the concentration of h3o in a solution that contains 5.5 * 10-5 m oh - at 25°c. identify the solution as acidic, basic, or neutral.

We have been given the OH⁻ ion concentration, we can calculate the pOH concentration.

pOH = - log [OH⁻]

pOH = - log (5.5 x 10⁻⁵ M)

pOH = 4.26

we can then calculate the pH value

pH + pOH = 14

pH = 14 - 4.26

pH = 9.74

since pH > 7 the solution is basic.

by knowing the pH value, we can calculate the H₃O⁺ concentration

pH = - log[H₃O⁺]

[H₃O⁺] = antilog (-pH) = antilog (-9.74)

[H₃O⁺] = 1.82 x 10⁻¹⁰ M