pH is the measure of the alkalinity or the acidity of the solution or the water. It measures the amount of the free hydroxyl and the free hydrogen ions in the water.
0.056234 M is the concentration.
How to calculate the concentration?
Given,
pH = 1.25
It can be calculated by the formula:
[tex]\rm pH = -log (H^{+})[/tex]
Substituting values we get,
[tex]\begin{aligned}\rm (H^{+}) &= \rm antilog (-pH)\\\\\rm (H^{+}) &= \rm antilog (-1.25)\\\\&= 0.0562 \rm M\end{aligned}[/tex]
Therefore, the concentration of [tex]\rm H^{+}[/tex] ion is 0.0562M or [tex](5.62 \times 10 ^{-2})[/tex]
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