The tree’s ellipsoidal yellow fruit is used for culinary and non-culinary purposes throughout the world, primarily for its juice, which has both culinary and cleaning uses. The pulp and rind (zest) are also used in cooking and baking. The juice of the lemon is about 5% to 6% citric acid, with a pH of around 2.2, giving it a sour taste. The distinctive sour taste of lemon juice makes it a key ingredient in drinks and foods such as lemonade and lemon meringue pie.
The lemon is a small tree (Citrus limon) that is green even in the winter. It came from Asia, and is also the name of the tree’s oval-shaped yellow fruit. The fruit is used for cooking and other things in the world – usually for its juice. … Lemon juice is about 5% citric acid, and has a pH of 2 to 3.