Question

Calculate the concentration of hydronium in a solution that contains 5.5x10-5 M OH- at 25C. Indentify the solution as acidic, basic, or neutral.

Answer 1

pH = 9.74

The solution is basic

Explanation:

To find the pH of the solution, we need to find the pOH of the solution.

From the question, the concentration of OH^- = 5.5x10^-5 M

pOH = - Log[OH^-]

pOH = - Log 5.5x10^-5

pOH = 4.26

Recall,

pH + pOH = 14

pH = 14 — pOH

pH = 14 — 4.26

pH = 9.74

Since the pH is above 7, the solution is alkaline ie basic