Question

If `pOH=10` for an aqueous solution, what is `pH`?

Answer 1

`pOH=10`.....................what is solution `pH`?

Explanation:

`pH+pOH=14` in aqueous solution under standard conditions. This is something you will simply have to remember.

And so `pOH=14-pH=14-4`, because `pH=-log_(10)[H_3O^+]`

See here for background. The use of logarithmic scales derives from pre-calculator days, when chemists, physicists, and ACCOUNTANTS used log tables to calculate the products of very large or very small numbers.