Question

why is salt added to ice when ice cream is prepared
in a
churner at home?


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Answer 1

Answer:

When you add just ice to the ice cream maker, the ice absorbs heat from the surrounding and starts melting. At 0C equilibrium is reached and the temperature cannot go any lower. ... But because of the presence of salt this mixture will re-freeze at lower temperatures than 0C.

Answer 2

The salt lowers the temperature at which water freezes, so with salt ice will melt even when the temperature is below the normal freezing point of water. ... When a freezing point is lowered, such as by adding salt to water, the process is called freezing-point depression.

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