A solution has [H+] = 4.2 x 10-3 M. The [OH-] in this solution is

Answer 1

To find the concentration of hydroxide ions ([OH-]), you can use the equation for the ion product of water:

[H+] x [OH-] = 1.0 x 10^-14

Rearranging the equation to solve for [OH-]:

[OH-] = (1.0 x 10^-14) / [H+]

Plugging in the given concentration of hydrogen ions ([H+] = 4.2 x 10^-3 M):

[OH-] = (1.0 x 10^-14) / (4.2 x 10^-3)

[OH-] ≈ 2.38 x 10^-12 M

Therefore, the concentration of hydroxide ions in the solution is approximately 2.38 x 10^-12 M.