What is the pH of lemon?

The pH of lemon juice is around 2 to 3, which means it is strongly acidic.

• pH is a scale that measures how acidic or basic a substance is, from 0 (most acidic) to 14 (most basic).
• A pH below 7 is acidic, pH = 7 is neutral, and above 7 is basic.
• Lemon contains citric acid, which releases hydrogen ions (H⁺) in water, making its pH low.

Because of its acidic nature, lemon juice tastes sour and can react with metals or bases. In chemistry experiments, pH indicators like litmus or universal indicator show red or orange color when tested with lemon juice.

Importance

• Lemon’s acidity helps preserve food.
• It acts as a natural cleaner and has antibacterial properties.
• In biology, it is an example of organic acid in fruits.