Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter11: Solutions And Colloids
Section: Chapter Questions
Problem 3E: When KNO3 is dissolved in water, the resulting solution is significantly colder than the water was...
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Question
How am I supposed to calculate the mass of the final solution?
![VC Grac X
O Que X
Q Che X
Colli x
b Ans X
> cour X
lab
* Lab
> how x
b Ans X
b My x
Q Hov
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CHEMISTRY • DETERMINE VAN'T HOFF FACTOR
SUBMIT
Lab Data
PHASE 5:
Potassium chloride
KCI
KCI
KCI
Measure freezing-point of
solution 1
Molar mass (g/mol)
74.55
74.55
74.55
Mass of calorimeter (g)
17.28
Complete the following steps:
sink and decant solution
Volume of DI water (mL)
48.9
Mass of potassium chloride (g)
Weigh calorimeter and
remaining ice on balance.
Record mass in Lab Data
1.08
7
Moles of potassium chloride (mol)
0.0145
Mass of calorimeter + solution (g)
67.13
Wash/Waste
Place used calorimeter in
Mass of calorimeter + solution + ice (g)
112.79
Wash/Waste bin
Freezing-point of solution (°C)
-0.59
Calculate following and record
in Lab Data
Mass of calorimeter + ice after decanting (g)
43.92
0.00 g
• Mass of ice added
• Mass of ice remaining
• Mass of melted ice
• Mass of water in solution (in
Mass of ice added (g)
45.66
TARE
Mass of ice remaining after decanting (g)
26.64
Mass of melted ice (g)
19.02
grams and kilograms)
• Molality
• Freezing-point depression
Mass of water in final solution (g)
Mass of water in final solution (kg)
Molality of solution (m)
TA
SHOW LABELS
GO TO PHASЕ 6
Freezing-point depression (°C)
PHASES
10:57 PM
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2/5/2021
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Transcribed Image Text:VC Grac X
O Que X
Q Che X
Colli x
b Ans X
> cour X
lab
* Lab
> how x
b Ans X
b My x
Q Hov
+
Ô https://newconnect.mheducation.com
...
V Dashboard UF Application for.
H Mail - Garnar Sutto..
A Macmillan Learning.
O Other favorites
CHEMISTRY • DETERMINE VAN'T HOFF FACTOR
SUBMIT
Lab Data
PHASE 5:
Potassium chloride
KCI
KCI
KCI
Measure freezing-point of
solution 1
Molar mass (g/mol)
74.55
74.55
74.55
Mass of calorimeter (g)
17.28
Complete the following steps:
sink and decant solution
Volume of DI water (mL)
48.9
Mass of potassium chloride (g)
Weigh calorimeter and
remaining ice on balance.
Record mass in Lab Data
1.08
7
Moles of potassium chloride (mol)
0.0145
Mass of calorimeter + solution (g)
67.13
Wash/Waste
Place used calorimeter in
Mass of calorimeter + solution + ice (g)
112.79
Wash/Waste bin
Freezing-point of solution (°C)
-0.59
Calculate following and record
in Lab Data
Mass of calorimeter + ice after decanting (g)
43.92
0.00 g
• Mass of ice added
• Mass of ice remaining
• Mass of melted ice
• Mass of water in solution (in
Mass of ice added (g)
45.66
TARE
Mass of ice remaining after decanting (g)
26.64
Mass of melted ice (g)
19.02
grams and kilograms)
• Molality
• Freezing-point depression
Mass of water in final solution (g)
Mass of water in final solution (kg)
Molality of solution (m)
TA
SHOW LABELS
GO TO PHASЕ 6
Freezing-point depression (°C)
PHASES
10:57 PM
O Type here to search
99+
2/5/2021
20
近
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