Question

How sodium citrate acts as reducing agent and trapping agent?

Answer 1

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ANSWER⤵⤵

In addition to buffering pH (reduce acidity), the citrate ion in sodium citrate also acts as a sequestering agent. This means that the citrate ion is likely to bind with other ions that are present in a solution---particularly calcium. In cheese, the calcium ions in cheese's casein milk proten are replaced with sodium ions. When this happens, the casein changes structure and exposes both water-loving and oil-loving ends. The casein, then, is the emulsifier, even though sodium citrate is considered an emulsifying salt.

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