What is the ratio of citric acid to lemon juice?

Citric acid is a naturally occurring organic acid that is found in citrus fruits. It is the primary acid that gives lemons their sour taste. The amount of citric acid in lemon juice can vary depending on the type of lemon and how ripe it is. However, on average, lemon juice contains around 5% to 6% citric acid. This means that for every 100 ml of lemon juice, there is approximately 5 to 6 grams of citric acid.