The is a measure of how acidic or basic a solution is.

The correct answer is pH.

Explanation:

The pH is a measure that is used to determine the acidity or alkalinity of a substance.

Its acronym is for hydrogen potential or hydrogenation potential.

It can be measured through a potentiometer or pH meter, which measures the potential difference between reference electrodes and glass electrodes that are sensitive to hydrogen ion.

It is a very important procedure and widely used in chemistry and biochemistry, since it determines many significant characteristics of the structure and activity of the molecules.

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