Question

What is the pH or a solution with `[H^+] = 7.0 times 10^-7`?

Answer 1

pH of `6.2`.

Explanation:

The pH of a solution has a range of 0-7. Each step having a logarithmic relation.

Thus we use the following equation: `pH = -log[H^+]`

`pH = -log[H^+]`

`= -log[(7xx10^-7)]`

`=6.15490196`

`=6.2`

Therefore, the acid has a pH of `6.2`. This number is very close to `7`, so we can conclude it is a weak acid.

Hope this helps :)