What is the pH of an aqueous solution with a hydrogen ion concentration of [H+] = 2.3 x 10^-9 M?

Answer 1

Hello, Caitlyn,

pH is defined as the negative log of the hydrogen ion concentration.

[H+] = 2.3 x 10^-9 M

-log (2.3x10^-9)

log of 2.3 is 0.3617

log of 10^-9 is -9

Add the two to get -8.638 and then multiply by -1 to yield pH = 8.6 (2 sig figs)

Bob