Question

What is the pH of a solution with [H+]= `2.3 x 10^-6`?

Answer 1

`pH=5.64`

Explanation:

`pH=-log_10[H_3O^+]`

`=-log_(10){2.3xx10^-6}`

`=-{-5.64}`

`=5.64`

If you are not confident with the logarithmic function please voice your concern. See here for the relationship between `pH` and `pOH` in aqueous solution.