Food scientists apply principles of titrations to food testing and develop foods that meet certain food-safety standards. For example, the acidity of milk increases with time, making it sour. Which statements make sense? Check all that apply.

Sour milk is acidic, so its pH is below 7, making statement A correct. Lactic acid is an acid, and titrating it with a base can be used to determine its concentration, so B is correct. For the same amount of milk, greater acidity means more acid to neutralize and therefore more base is needed, making C correct.

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