Determination of pH

The acidic or basic property of substances is measured in terms of pH. It is a measurement of the hydrogen ion concentration. pH is defined as the negative logarithm (base 10) of hydrogen ion concentration.

​Definition of pH

​pOH is used to measure the concentration of hydroxyl ions (OH- ions) or the alkalinity of a solution. pOH is defined as the negative logarithm (base 10) of hydroxyl ion concentration.

​Defintion of pOH

​•pH of a solution is measured using pH indicators.

•pH indicators are substances that changes colour when in contact with acidic, basic or neutral solutions.

Measurement of pH

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