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In ice-cream making, the temperature of the ingredients is kept below 0.0°C in an ice-salt bath....

In ice-cream making, the temperature of the ingredients is kept below 0.0°C in an ice-salt bath. Assuming that NaCl dissolves completely and forms an ideal solution, what mass of it is needed to lower the melting point of 5.5 kg of ice to −5.0°C?(Kf of water is 1.86°C/m.) g The answer should be rounded to 2 significant figures.

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In ice-cream making, the ingredients are kept below 0.0 degrees C in an ice-salt bath. (a)...
In ice-cream making, the ingredients are kept below 0.0 degrees C in an ice-salt bath. (a) Assuming that NaCl dissolves completely and forms an ideal solution, what mass of it is needed to lower the melting point of 5.5 kg of ice to - 5.0 degrees C? (b) Given the same assumptions as in part (a), what mass of CaCl2 is needed?
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