Calculating the freezing point of a homemade ice-ceam mixture? - homemade frozen bucket margarita mix recipe
Homemade ice cream is frozen by the mixture suspended in a bucket of water into ice-water and salt mixture. A mixture of typical calls of 1.70 kg of salt (NaCl) and 5.25 kg of ice. Calculate the mole fraction of NaCl in the mixture until all the ice melts.
I calculated the mole fraction of NaCl after the melting of the ice
0.0908
Calculate the freezing point of the mixture (° C).?
Sunday, January 24, 2010
Homemade Frozen Bucket Margarita Mix Recipe Calculating The Freezing Point Of A Homemade Ice-ceam Mixture?
1 comment:
First, forget the mole fraction of a bit. Divide the number of moles of sodium chloride (NaCl 1.70 kilograms / mm (22.99 g / mol Na + 35.45 g / mol Cl) = 29.08966461 mol NaCl) through the books of solvents, which in this case water (5.25 kilograms) for the molality (29.08966461 kg of water mole NaCl/5.25 molality = 5.540888498). As the van t Hoff factor "i" of NaCl in water is 2, 2 multiplied molality and freezing point of water is a constant 1.86 ° / mol, multiply the number 1, 86 and (5.540888498 molality x 2 x 1 , 86) for changing the freezing temperature (20.61210521 degrees Celsius), which are ultimately withdrawn) by the normal freezing point of water (0 degrees Celsius) for the cold mixture (0 to 20.61210521 = -20,612 degrees Celsius.
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