XXExperimer0 Mail Dirk XExperiment 10B HomepagG sodium++Yuzu: Safe Xhttps://www.the collegegateway.com/ChemWeb/site/StudentFormView.php?sectionld=327&L...:https://www.thecollegegateway.com/ChemWeb/site/images/assignments/2/Experiment9%20..CTable 10.4 cont.B. Freezing-Point Depression-30Table 10.4 (data)Sodium Chloride Solute Ethylene Glycol SoluteMass of beaker icewater 111.438112.337 gMass of empty beaker 58.650 gFreezing point of pure wateroCMass of sample + container 7.686 gMass of empty container 2.676 g53.263 c- 200 C33.185 g28.524 gFreezing point of solution6 C-3 C10Table 10.5 (report)Sodium Chloride Solute Ethylene Glycol SoluteTotal water massMass of soluteMoles of solute?tWater mass in kg10Solution molalityKC. Boiling-Point Elevation-20Table 10.6 (data)Boiling point of pure waterFreeing point of solution, ethylene glycol soluteSucrose SoluteEthylene Glycol SoluteVolume of water usedNote: Remember, temperatures below zero should be read -1,-2, -3as you move down the thermometer scale, where each mark belowzero corresponds to -1°CMass of solute containerMass of empty containerBoiling point of solutionAll photos are Copyrighted by Maren Hansen.10:14 AMOTYPE here to search4/4/2019

Question
Asked Jun 6, 2019
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X
X
Experimer
0 Mail Dirk X
Experiment 10
B Homepag
G sodium
+
+
Yuzu: Safe X
https://www.the collegegateway.com/ChemWeb/site/StudentFormView.php?sectionld=327&L...
:
https://www.thecollegegateway.com/ChemWeb/site/images/assignments/2/Experiment9%20..
C
Table 10.4 cont.
B. Freezing-Point Depression
-30
Table 10.4 (data)
Sodium Chloride Solute Ethylene Glycol Solute
Mass of beaker ice
water 111.438
112.337 g
Mass of empty beaker 58.650 g
Freezing point of pure wateroC
Mass of sample + container 7.686 g
Mass of empty container 2.676 g
53.263 c
- 20
0 C
33.185 g
28.524 g
Freezing point of solution6 C
-3 C
10
Table 10.5 (report)
Sodium Chloride Solute Ethylene Glycol Solute
Total water mass
Mass of solute
Moles of solute
?t
Water mass in kg
10
Solution molality
K
C. Boiling-Point Elevation
-20
Table 10.6 (data)
Boiling point of pure water
Freeing point of solution, ethylene glycol solute
Sucrose Solute
Ethylene Glycol Solute
Volume of water used
Note: Remember, temperatures below zero should be read -1,-2, -3
as you move down the thermometer scale, where each mark below
zero corresponds to -1°C
Mass of solute container
Mass of empty container
Boiling point of solution
All photos are Copyrighted by Maren Hansen.
10:14 AM
OTYPE here to search
4/4/2019
help_outline

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X X Experimer 0 Mail Dirk X Experiment 10 B Homepag G sodium + + Yuzu: Safe X https://www.the collegegateway.com/ChemWeb/site/StudentFormView.php?sectionld=327&L... : https://www.thecollegegateway.com/ChemWeb/site/images/assignments/2/Experiment9%20.. C Table 10.4 cont. B. Freezing-Point Depression -30 Table 10.4 (data) Sodium Chloride Solute Ethylene Glycol Solute Mass of beaker ice water 111.438 112.337 g Mass of empty beaker 58.650 g Freezing point of pure wateroC Mass of sample + container 7.686 g Mass of empty container 2.676 g 53.263 c - 20 0 C 33.185 g 28.524 g Freezing point of solution6 C -3 C 10 Table 10.5 (report) Sodium Chloride Solute Ethylene Glycol Solute Total water mass Mass of solute Moles of solute ?t Water mass in kg 10 Solution molality K C. Boiling-Point Elevation -20 Table 10.6 (data) Boiling point of pure water Freeing point of solution, ethylene glycol solute Sucrose Solute Ethylene Glycol Solute Volume of water used Note: Remember, temperatures below zero should be read -1,-2, -3 as you move down the thermometer scale, where each mark below zero corresponds to -1°C Mass of solute container Mass of empty container Boiling point of solution All photos are Copyrighted by Maren Hansen. 10:14 AM OTYPE here to search 4/4/2019

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Expert Answer

Step 1

Solution for sodium chloride solute :

First we have to calculate the mass of sample.

Mass of sample + Mass of container 7.686 g
Mass of sample 2.678 g = 7.686 g
Mass of sample = 5.01 g
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Mass of sample + Mass of container 7.686 g Mass of sample 2.678 g = 7.686 g Mass of sample = 5.01 g

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Step 2

Now we have to calculate the mass of water by using the formula of depression in freezing point.

where,

Tf = depression in freezing point

Tof = freezing point of pure water

Ts = freezing point of solution

m = molality of solution

kf = freezing point constant of water = 1.86 oC/m

i = Van't Hoff factor for NaCl electrolyte = 2

дТ, 3ixk,
X m
Mass of NaClx1000
T-Tixk,
X
f
Molar mass of NaCl x Mass of water
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дТ, 3ixk, X m Mass of NaClx1000 T-Tixk, X f Molar mass of NaCl x Mass of water

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Step 3

Now putting all the given values in this ...

AT, ixk
5.01g x1000
0° C-(-6 C) 2x (1.86 C /m)x
58.5g/molex Mass of water
53.09
Mass of water = 53.09 g 1000
0.05309Kg
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AT, ixk 5.01g x1000 0° C-(-6 C) 2x (1.86 C /m)x 58.5g/molex Mass of water 53.09 Mass of water = 53.09 g 1000 0.05309Kg

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