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10.) Freezing point depression (ΔTf) Use the equation: ΔTf = Tf (solution) – Tf (solvent) The freezing point of pure water is 0.00 °C 11.) Actual van't Hoff factor (i) for CaCl2 Use the equation: ΔTf = –i Kf m Kf for water is 1.86 °C/m

10.) Freezing point depression (ΔTf) Use the equation: ΔTf = Tf (solution) – Tf (solvent) The freezing point of pure water is 0.00 °C 11.) Actual van't Hoff factor (i) for CaCl2 Use the equation: ΔTf = –i Kf m Kf for water is 1.86 °C/m

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter10: Solutions
Section: Chapter Questions
Problem 81QAP: Beaker A has 1.00 mol of chloroform, CHCl3, at 27C. Beaker B has 1.00 mol of carbon tetrachloride,...
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10.) 

Freezing point depression (ΔTf)

Use the equation:

ΔTf = Tf (solution) – Tf (solvent)

The freezing point of pure water is 0.00 °C

 

11.) 

Actual van't Hoff factor (i) for CaCl2

Use the equation:

ΔTf = –i Kf m

Kf for water is 1.86 °C/m

 

10.9744 1. Mass CaCl, (8) 100.0 2. Volume of water (mL) 51.3611 3. Mass ice (g) -3.57 Freezing point of the 4. solution (*C) of // Part 2 Calculations What is the predicted value of i for CaCl,? 3 5. For electrolytes, assume i = the number of ions per formula unit. of // Moles of solute (mol) 6. The molar mass of CaCl, is 110.98 g/mol. // Mass of solvent in grams Add together the masses of the liquid water 7. and ice added to the calorimeter. Convert the volume of liquid water to mass using 1.000 g/ml as the density of water (see procedure for volume used). // Mass of solvent in kilograms 8. Use the metric definition 1 kg = 1000 g
Transcribed Image Text:10.9744 1. Mass CaCl, (8) 100.0 2. Volume of water (mL) 51.3611 3. Mass ice (g) -3.57 Freezing point of the 4. solution (*C) of // Part 2 Calculations What is the predicted value of i for CaCl,? 3 5. For electrolytes, assume i = the number of ions per formula unit. of // Moles of solute (mol) 6. The molar mass of CaCl, is 110.98 g/mol. // Mass of solvent in grams Add together the masses of the liquid water 7. and ice added to the calorimeter. Convert the volume of liquid water to mass using 1.000 g/ml as the density of water (see procedure for volume used). // Mass of solvent in kilograms 8. Use the metric definition 1 kg = 1000 g
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