Question

What is the pH of a `8.7*10^-12` `M` solution?

Answer 1

I assume that `[H_3O^+]=8.7xx10^(-12)` in water under standard conditions.

Explanation:

In aqeuous solution, `pH=-log_10[H_3O^+]`

`=` `-log_10(8.7xx10^-12)` `=` `-(-11.06)` `=` `11.1`