Ph Of Lemon Juice: 5 Factors You Should Know!

What is the pH of Lemon Juice?

The pH of lemon juice depends on the type of lemon and its ripeness. Broadly, lemon juice’s pH lies ranges from 2 to 3, indicating that it is extremely acidic. The low pH of lemon juice is due to the high content of citric acid, which accounts for up to 8% of its composition. 

The pH of different types of juices

The pH of some common types of juices are mentioned below.

Type of JuicepH Level
Lemon juice2.0 to 3.0
Orange juice3.3 to 4.2
Grapefruit juice3.0 to 3.3
Pineapple juice3.3 to 5.0
Apple juice3.3 to 4
Tomato juice4.1 to 4.6
Cranberry juice2.3 to 2.5
Grape juice3.3 to 4.5
Carrot juice4.9 to 5.4

Factor affecting the pH of Lemon Juice

The pH of lemon juice can be affected by several factors, including

  1. Citric acid content: Lemon juice contains citric acid, which is a weak acid that gives it its tart taste. The more citric acid present in the lemon juice, the lower the pH will be.
  2. Concentration: The concentration of lemon juice in a solution can affect its pH. The more concentrated the lemon juice, the lower the pH will be.
  3. Ripeness: The ripeness of the lemon can affect the pH of the juice. Ripe lemons contain more citric acid and will have a lower pH than unripe lemons.
  4. Temperature: The temperature of the lemon juice can affect its pH. Higher temperatures can cause the citric acid to break down and reduce the acidity of the juice, resulting in a higher pH.
  5. Storage: The way lemon juice is stored can affect its pH. Exposure to air can cause the citric acid to break down, reducing the acidity and resulting in a higher pH. 
  6. Water quality: The pH of lemon juice can also be affected by the pH of the water used to dilute it. If the water is acidic, it can lower the pH of the lemon juice.

How can we Decrease the pH level of Lemon Juice?

We can decrease the pH of lemon juice by adding an alkaline substance. Baking soda is a common household alkaline substance that can be used to lower the acidity of lemon juice.

Steps for adding Baking Soda to Lemon Juice

  • Measure out the amount of lemon juice you want to use.
  • In a different container, mix 1/4 teaspoon of baking soda in 1 cup of water.
  • Add a little baking soda solution to the lemon juice and stir constantly.
  • Keep adding small amounts of the baking soda solution into lemon juice until the desired pH level is attained.

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.

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