Question

If the hydronium ion concentration of a solution is `1.63 * 10^-8` `M`, what is the hydroxide ion concentration?

Answer 1

`pH+pOH=14`, in aqueous solution at `298K`

Explanation:

If `[H_3O^+]=1.63xx10^-8`, then `pH=-log_10(1.63xx10^-8)`.

And `[HO^-]` `=` `10^(pH-14)`, which should be less than `7`. Why so?