Chemistry
Peptization is a process of

Dispersing precipitates into colloidal solution
Precipitation of colloidal particles
Purification of colloids
Protection of colloidal solution

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Chemistry
The main use of salt in the diet is to

increase the solubility of food particles in water
ease the process of cooking
produce in small amounts the hydrochloric acid required for the digestion of food
make the taste of food better

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