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What is the full form of pH?
The pH stands for "power of hydrogen". The "H" is capitalized because it is the hydrogen element symbol. pH is a measure of how acidic or basic an aqueous solution is. It is a scale developed to measure the concentration of hydrogen ion in a solution is known as pH scale. The pH scale ranges from 0 (highly acidic) – 14 (highly alkaline). The pH of a neutral solution is 7.
The pH Scale is used to measure acidity or alkalinity of water-soluble substances (pH stands for 'potential of Hydrogen').
It measures H+ concentration in a solution.
- The pH scale ranges from 0 to 14.
- A pH less than 7 is acidic in nature.
- A pH of 7 is neutral.
- A pH greater than 7 is basic in nature.
The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per litre (molarity).
The pH is then calculated using the expression: pH = - log [H3O+].
Updated on: 10-Oct-2022
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