A mixture of salt and ice is used to chill the contents of old-fashioned,hand-operated ice cream makers.What is the melting point of a mixture of 1.0 lb of sodium chloride and 16 lb of ice if exactly half the ice melts? Assume ideal behavior and that all the sodium chloride dissolves in the melted ice water. [K_f(water)= 1.86 $\circ$ C/m; 1 lb = 453.6 g]

Question

Quizplus · Accepted Answer

The correct answer is A because the melting point of the mixture is -8.0 °C. This is because the addition of salt to ice lowers the freezing point of the ice, causing it to melt at a lower temperature. The amount of salt added determines the extent to which the freezing point is lowered. In this case, the addition of 1.0 lb of sodium chloride to 16 lb of ice lowers the freezing point by 8.0 °C.

A Mixture of Salt and Ice Is Used to Chill ∘\circ∘

A Mixture of Salt and Ice Is Used to Chill $\circ$