Which juice is most acidic? Orange, Lemon, or Lime?

Some citrus fruits taste more sour, and therefore are more acidic, than others. It is

the purpose of this experiment to determine the total acidity of orange, lemon, or lime juice. This procedure can be used to determine the total acidity of most natural fruit juices without further preparation. Citric acid is the acid primarily responsible for the sour taste in citrus fruits. Citric acid is a polyprotic acid in which three ionizable hydrogens (as numbered in the image) may be neutralized by a strong base.

Lab Procedure