The `pH` of a solution is `5.00`. To this solution, sufficient acid is added to lower the `pH` to `2.00`. The corresponding increase in `H_(3)O^(o+)` ion concentration is

Options

A. 1000 times
B. 2.5 times
C. 100 times
D. 5 times

Answer

A

Explanation

`[H_(3)O^(+)]=10^(-5)`
On adding acid new `[H_(3)O^(+)] =10^(-2)`
`:. ` Increase in `[H_(3)O^(+)]=10^(3)`