[imanooblar]

Would I be correct to make the following statements:

If 99% of the H+ in a solution of pH 1.3 were neutralized then the final pH would be 3.3.
- Because the number of H+ ions drops by a factor of 10² so pH would increase by log (10²) units.

Here's where I get confused.
If 99.9% of the H+ in a solution of pH 1.3 were neutralized then the final pH would be 4.3.
- Because the number of H+ ions drops by a factor of 10³ so pH would increase by log (10³) units.

If 99.99% of the H+ in a solution of pH 1.3 were neutralized then the final pH would be 5.3.
- Because the number of H+ ions drops by a factor of 10⁴ so pH would increase by log (10⁴) units.

Somehow it just hard to imagine that as you go from 99.9% of H+ neutralized to 99.99% of H+ neutralized, you increase one whole pH point. Just wanted to see if it was correct.

[Matias Ekstrand]

It is correct.

[Borek]

Somehow it just hard to imagine that as you go from 99.9% of H+ neutralized to 99.99% of H+ neutralized, you increase one whole pH point.

Think about it this way: ten times less is left.

[imanooblar]

Alright thanks guys!