Data SheetUNKNOWN NUMBER:149.8345758.0812.47I1.0311.441. Mass of test tube + naphthalene2. Mass of empty test tube%3D3. Mass of naphthalene4. Mass of vial + Unknown%3D5. Mass of vial%3D6. Mass of UnknownCooling curve dataPure NaphthaleneNaphthalene + UnknownTempTimeTempTimeTempTimeTempTime79 0.5T4-9 520:7 5:3078:2 020749 S:3085.2 3084.5B15 1:3070.9 66.7072 3014.9 614.9 6:3075.6 1:08C 74 975:5220.069.8 7.69.4 7:3068.968:376:5. Imit7475.02.9749,3.28.2 276 Y25.022. 3..2:10"NS 1303:30 24.0 923-4 9:3074.9.4.30 23.58:)0679 967.2 9.30.21.871.4 433074.994.9 u१:१०:30 67.2 1020.9 Sb6.5 10.3075-575010:5066.0 17. Freezing point of pure Naphthalene from cooling curve =8. Freezing point of solution9. AT10. Molality of solution, m11. Molar mass of Unknown12. Include graphs of cooling curvesCALCULATIONS

Answered: Image /qna-images/answer/e9875adf-0dc4-4d5c-85b3-5a599de34af1.jpg

Answered: 7. Freezing point of pure Naphthalene…

7. Freezing point of pure Naphthalene from cooling curve- 8. Freezing point of solution 9. AT 10. Molality of solution, m I1. Molar mass of Unknown 12. Include graphs of cooling curves CALCULATIONS

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.21QAP

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Data Sheet
UNKNOWN NUMBER:
1
49.83
4575
8.08
12.47
I1.031
1.44
1. Mass of test tube + naphthalene
2. Mass of empty test tube
%3D
3. Mass of naphthalene
4. Mass of vial + Unknown
%3D
5. Mass of vial
%3D
6. Mass of Unknown
Cooling curve data
Pure Naphthalene
Naphthalene + Unknown
Temp
Time
Temp
Time
Temp
Time
Temp
Time
79 0.5
T4-9 5
20:7 5:30
78:2 020
749 S:30
85.2 30
84.5
B15 1:30
70.9 6
6.70
72 30
14.9 6
14.9 6:30
75.6 1:08C 74 9
75:52
20.0
69.8 7.
69.4 7:30
68.9
68:3
76:5. Imit
74
75.02.9
749,3.
28.2 2
76 Y
25.0
22. 3.
.
2:10
"NS 130
3:30 24.0 9
23-4 9:30
74.9.4.30 23.5
8:)0
679 9
67.2 9.30
.
21.8
71.4 4
330
74.9
94.9 u
१:१०
:30 67.2 10
20.9 S
b6.5 10.30
75-5
750
10:50
66.0 1
7. Freezing point of pure Naphthalene from cooling curve =
8. Freezing point of solution
9. AT
10. Molality of solution, m
11. Molar mass of Unknown
12. Include graphs of cooling curves
CALCULATIONS

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