Question 8.5: The [OH^-] of an aqueous solution is 1.0 × 10^-4 M. What is ...
The [OH^-] of an aqueous solution is 1.0 × 10^{-4} M. What is its [H_3O^+] ?
Strategy
To determine the hydrogen ion concentration when you know the hydroxide ion concentration, you simply divide the [OH^-] into 10^{-14}.
Solution
We substitute into the equation:
[H_3O^+]=\frac{1.0 \times 10^{-14}}{1.0 \times 10^{-4}} =1.0 \times 10^{-10} M
Problem 8.5
The [OH^-] of an aqueous solution is 1.0 \times 10^{-12} M. What is its [H_3O^+] ?
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