Question

What will happen to the pH of a substance if the concentration of hydrogen `[H^+]` ions increases from `1.0 times 10^-8` to `1.0 times 10^-6`?

Answer 1

It will decrease by `2`.

Explanation:

The `"pH"` of solution is defined as -`log(["H"^+])`.

For `["H"^+]=10^-8,` `"pH"=8`

For `["H"^+]=10^-6,` `"pH"=6`