What is an acid?
An acid is a substance that releases hydrogen when dissolved in water. Acids are also known as the opposite of bases. They're also common substances found/used in daily everyone's daily life. They can be found in soft drinks, vinegar and fruits.
What is the general pH in Lemon Juice?
The general pH in lemon juice, is around 2. This makes lemon juice highly acidic. These fruits are classified as acidic because they contain acids the body can't metabolize.
This pH chart shows where lemon juice pH level is.