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How do you find H3O+ from OH- Concentration?
Calculate [H3O+ ] for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral.
(a) [OH‾] = 0.00043 M
(b) [OH‾] = 3.0 10-9 M
(c) a solution in which [OH‾] is 100 times greater than [H+ ]
Please guide me through it don't just tell me the answers
1 Answer
- Anonymous9 years agoFavorite Answer
You know that Keq=[H3O+][OH-]
Next, Rearrange the equation to solve for [H3O+]
which would be: Keq/[OH-]=[H3O+]
Keq is an equilibrium constant which @ 25ºC ALWAYS equals 1e-14 (same thing as 1.00 x 10^-14)
So: 1e-14 / 0.00043= 2.3255814e-11 , 2 sig figs in equations so round..
Final Answer = 2.3e-11
Source(s): Honors Chemistry.