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Answer: (4)
Explanation:
pH is a scale used in chemistry to quantify the acidity or basicity of an aqueous solution. It is previously denoted as “potential of hydrogen” (or “power of hydrogen”). Acidic solutions (those containing a larger concentration of H+ ions) have a lower pH than basic or alkaline solutions.
The chemical solution’s pH ranges from 0 to 14. Acidic solutions have a pH value ranging from 0 to 7 on the pH scale, while basic solutions have a pH value ranging from 7 to 14 on the pH scale. Neutral solutions are those that have a pH of 7 or higher on the pH scale.
Lemon juice is made up of two acids: citric and malic. About 5–8% citric acid (tart flavour) and vitamin C (ascorbic acid) are present in the juice. Lemons have a high acidity level. The pH of lemon juice is around 2.0 and ranges from 2 to 3.
