The mass of the electron is.. A) about equal to the neutron
B) almost the same as the proton
C) very small compared to the proton
D) very large compared to the neutron

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.