A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that they had 50 mL of water (you can assume water has a density of 1.00 g/mL) in the 1st test tube and the freezing point for the water by itself was measured to be -0.01 °C.  When they added the CaCl2(s) to 50 mL water in a 2nd test tube and measured the freezing point with the same thermometer they got a freezing point of -1.868°C.  The Kf value for water is 1.858 °C/m.  What was the mass of CaCl2(s) that the students added to the 2nd test tube

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
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A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that they had 50 mL of water (you can assume water has a density of 1.00 g/mL) in the 1st test tube and the freezing point for the water by itself was measured to be -0.01 °C.  When they added the CaCl2(s) to 50 mL water in a 2nd test tube and measured the freezing point with the same thermometer they got a freezing point of -1.868°C.  The Kf value for water is 1.858 °C/m.  What was the mass of CaCl2(s) that the students added to the 2nd test tube?

 

Question 3 options:

 

3.09

 

1.09

 

1.87

 

2.03

 

2.63

 

1.61

 

0.86

 

2.24

 

2.87

 

2.40

 

1.25

 

1.42

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