Chemistry Practice Problems Freezing Point Depression Practice Problems Solution: In ice-cream making, the ingredients are kept belo...

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Solution: In ice-cream making, the ingredients are kept below 0.0°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°C?(b) Given the same assumptions as in part (a), what mass of CaCl2 is needed?

Problem

In ice-cream making, the ingredients are kept below 0.0°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°C?
(b) Given the same assumptions as in part (a), what mass of CaCl2 is needed?