Question

What is the H concentration in a solution with a pH of 1. 25? Round to the nearest hundredth. × 10n M n=.

Answer 1

The pH is the measure of hydrogen ion concentration in a solution. The hydrogen ion concentration at pH 1.25 is  $\rm\bold{ 5\;\times 10^{-2}\;M}$.

How to calculate hydrogen concentration?

The pH is the negative logarithmic value of the hydrogen ion concentration in the sample.

The pH can be expressed as:

$\rm pH=-log[H^+]$

The hydrogen ion concentration can be given as:

$\rm [H^+]=10^{-pH}$

The given pH is 1.25 The hydrogen ion concentration is given as:

$\rm [H^+]=10^{-1.25}\\H^+=0.05\;M\\H^+=5\;\times\;10^-^2\;M$

The hydrogen ion concentration in the solution is $\rm 5\;\times\;10^{-2}\;M$.

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