When the PH of a Solution Is 1, the Concentration

Multiple Choice

When the pH of a solution is 1, the concentration of hydronium ions is M, which is the same as 0.1 M. Assume that the volume of this solution is 500 mL and that the solution is not buffered. What would be the new pH of this solution after 500 mL of pure water is added? You will need a calculator with a log function to answer this question.

A) 13
B) 1.3
C) 0.13
D) 1.03