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Chapter 23: Problem 66

The label of a certain brand of mayonnaise lists EDTA as a food preservative. How does EDTA prevent the spoilage of mayonnaise?

Short Answer

Expert verified
EDTA prevents the spoilage of mayonnaise by binding to metal ions in the product, and thus, eliminating their tendency to promote oxidation and spoilage. In effect, the shelf life of the mayonnaise is extended.

Step by step solution

01

Understand The Role of EDTA

EDTA, also known as Ethylenediaminetetraacetic Acid, is commonly used as a food preservative. It acts by binding to metal ions in a process known as chelation. This effectively removes these ions from the food product, thereby eliminating their potential to promote oxidation and spoilage.
02

The Chemistry Behind it

In more detail, the process of the EDTA binding to metal ions is due to the ability of EDTA to form multiple bonds with a single metal ion, thereby 'trapping' it. In doing so, it takes the metals that would otherwise accelerate the oxidation process (which would lead to deterioration and spoilage) out of the equation.
03

Relation to Mayonnaise Spoilage

Specifically in mayonnaise, the EDTA effectively neutralizes trace amounts of metal ions that could compromise the food product. Without these metal ions accelerating oxidation, the mayonnaise takes a longer time to spoil, thus extending its shelf life.

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