Question

If a solution has a `[H^+]` concentration of `4.5 * 10^-7` `M`, is this an acidic or basic solution?

Answer 1

The solution is acidic inasmuch as `pH<7`.

Explanation:

In water, acidity is measured by the logarithmic function `pH`, where `pH` `=` `-log_(10)[H_3O^+]`.

So `-log_(10)(4.5xx10^-7)` `=` `6.35`. This is slightly acidic as anticipated.