Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Using both images attached please do the calculations in the image attached
Please also do calculations for:
1) mol solute
2) kg solvent
3) m solution
4) Freezing Point Depression
5) van't Hoff factor (i)
6) Correct Significant Figures and Units followed
Transcribed Image Text:Calculations
1
2
3
3
4
5
6
7
8
9
10
11
12
13
14
15
16
mass solvent (H₂O) =
molsolute = mass
msolution
Find the molality of the solution (from Part C):
mass solute (NaCl) =
molar mass solute (NaCl):
molar mass
2
3
4
5
= molsolute
kgsolvent
6
7
8
9
10
11
12
13
14
15
AT IK msolution
=
-9.6°C
-10°C
Calculate van't Hoff factor (i):
-11°C
- 11.5°C
g
g
kg
Calculate the change in temperature (FP Depression):
AT=FP solvent - FP solution
g/mol
FP solvent from Data Table B
FP
= from Data Table C
solution
K₁ = 1.80°Ckg/mol
AT = from step 2
msolution = from step 1
Transcribed Image Text:Exp3: Calculation of van't Hoff factor(i) using Freezing Point Depression
Data Table A
(The temperature should reach atleast -10°C)
Time (min)
0
5
10
15
20
#
1
2
3
4
5
Data Table B
(Continue recording data till the temperature is constant for atleast
2 minutes at 0°C)
FP solvent
(It should be 0°C)
FP.
mass of dl water
#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
=
Time (min)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
Data Table C
(Continue recording data till the temperature is constant ~ -14°C)
(It should be -14°C)
solution
Temperature (°C)
-5°C
-10°C
10g
U
Temperature (°C)
3°C
1°C
0°℃
mass of water
mass of crystalline NaCl 1.002g
#
Time (min)
0
1
Temperature (°C)
5°℃
3°C
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Step 1: Given data and required constants
VIEWStep 2: Determination of number of moles of solute.
VIEWStep 3: Determination of mass of solvent in kg
VIEWStep 4: Determination of molality
VIEWStep 5: Determination of freezing point depression
VIEWStep 6: Determination of van't Hoff factor
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