An acidic fog in pasadena was found to have a ph of 2.50. which expression represents this ph measurement?

Supposing a temperature of 25 degrees and supposing that all activity coefficients are 1

pH = - log[H+]

pOH = - log[OH-]

pH + pOH = 14

Thus a pH of 2.50 would mean that the [H+], the concentration of the hydrogen ion, would be 10^ (-2.50)

pH + pOH = 14

pOH = 14 - pH = 14 - 2.5 = 11.5

MOH - levels would be coordinated with pOH

pOH = - log[OH-] = = > [OH-] = [MOH-] = 10^-pOH = 10^-11.5 = 3.2 x 10^-12

Therefore, MOH¯ = 3.2 * 10¯12 M