Titratable acidity Flashcards
Titratable acidity
The total acid concentration contained within a food sample (total acidity). Is determined by titration of the food and is a good predictor of acid impact on flavor.
Food acids are often ______, but can also be _____ and _____.
Organic acids, Phosphoric and carbonic
4 effects of acids on food functionality.
Flavor, shelf life/preservation, texture, and food colors
titratable acidity and sugar content are used as an indicator of what?
Maturity of fruits
Titratable acidity is determined by….
neutralizing the acid present in a know weight or volume of product with a standard base
Potentiometric end point
End point of titration is when the titration reaches a target pH.
Colorimetric end point
End point is determined by a color change of an added indicator dye.
Colorimetric end point
End point is determined by a color change of an added indicator dye.
Neutralization reaction
Reaction of an acid with a base to form water and a salt
Equivalent weight
The molecular weight divided by the number of equivalents in the reaction.
Molarity
The number of moles of solute per liter of solution.
Normality
The number of equivalents of solute per liter of solution.
Normality
The number of equivalents of solute per liter of solution.
Phenolphtalein changes color to _____ between the pHs ___ and ____.
pink, 8-9.6
Phenolphtalein changes color to _____ between the pHs ___ and ____.
pink, 8-9.6
