d.) Calculate the molality of the Nace and MgCl2.6H2O solutions.

Chemistry: An Atoms First Approach
2nd Edition
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Author:Steven S. Zumdahl, Susan A. Zumdahl
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Chapter10: Properties Of Solutions
Section: Chapter Questions
Problem 31E: Common commercial acids and bases are aqueous solutions with the following properties: Density...
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Sucrose solution for experiment 1: (Question a-c)
Prepare a solution of sucrose by accurately weighing 9.0 – 9.25 g of sucrose into a 100mL
beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all
crystals dissolve.
NaCl solution for experiment 2: (Question d-f)
Prepare a solution of NaCl by accurately weighing approximately 1.5 g of NaCl into a 100 mL
beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all
crystals dissolve.
MgCl2٠6H2O solution for experiment 2: (Question d-f)
Prepare a solution of magnesium chloride by accurately weighing approximately 3.6 g of
MgCl2٠6H20 into a 100 mL beaker / conical flask. Record the mass of the sample. Add 25 mL
distilled water. Mix until all the crystals dissolve

 

 

Sucrose solution for experiment 1:
Prepare a solution of sucrose by accurately weighing 9.0 9.25 g of sucrose into a 100mL
beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all
crystals dissolve.
NaCl solution for experiment 2:
Prepare a solution of NaCl by accurately weighing approximately 1.5 g of NaCl into a 100 mL
beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all
crystals dissolve.
MgCl2 6H₂O solution for experiment 2:
Prepare a solution of magnesium chloride by accurately weighing approximately 3.6 g of
MgCl₂ + 6H₂0 into a 100 mL beaker / conical flask. Record the mass of the sample. Add 25 mL
distilled water. Mix until all the crystals dissolve.
Glycerol solution for experiment 3:
Accurately weigh approximately 2.5 g glycerol into a 100 mL beaker / conical flask. Record the
mass of the sample. Add 25 mL distilled water. Mix well.
Preparation of Ice Bath
Transcribed Image Text:Sucrose solution for experiment 1: Prepare a solution of sucrose by accurately weighing 9.0 9.25 g of sucrose into a 100mL beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all crystals dissolve. NaCl solution for experiment 2: Prepare a solution of NaCl by accurately weighing approximately 1.5 g of NaCl into a 100 mL beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all crystals dissolve. MgCl2 6H₂O solution for experiment 2: Prepare a solution of magnesium chloride by accurately weighing approximately 3.6 g of MgCl₂ + 6H₂0 into a 100 mL beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix until all the crystals dissolve. Glycerol solution for experiment 3: Accurately weigh approximately 2.5 g glycerol into a 100 mL beaker / conical flask. Record the mass of the sample. Add 25 mL distilled water. Mix well. Preparation of Ice Bath
Temp (°C)
12-
10-
8
TE
6 +
4
2
O
TA
A
+
-2
H₂O
-4
Time (s)
MgCl₂.6H₂0
Na Cl
Figure 2: Cooling curves for pure water, an
aqueous sodium chloride and an aqueous
magnesium chloride solution.
e.) Calculate the total mass of water
(solvent) in kg:
i.) Mass of crystal water added (kg):
ii)
Mass of water added (kg):
iii) Total mass of water added (kg):
S
d.) Calculate the molality of the NaCl and
MgCl2.6H₂O solutions.
f.) Calculate the molality of MgCl2.
Transcribed Image Text:Temp (°C) 12- 10- 8 TE 6 + 4 2 O TA A + -2 H₂O -4 Time (s) MgCl₂.6H₂0 Na Cl Figure 2: Cooling curves for pure water, an aqueous sodium chloride and an aqueous magnesium chloride solution. e.) Calculate the total mass of water (solvent) in kg: i.) Mass of crystal water added (kg): ii) Mass of water added (kg): iii) Total mass of water added (kg): S d.) Calculate the molality of the NaCl and MgCl2.6H₂O solutions. f.) Calculate the molality of MgCl2.
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