Question 8 A student was experimenting with density to find the percent composition of an unknown mixture of ethanol and water. He found the mass of a beaker to be 25.439 g and then pipetted exactly 10.000 mL of his mixture into it with a volumetric pipette. The combined mass of the beaker and solution was 34.992 g. The experiment took place at 20.0°C Temperature (C) Density Water (g/mL) Density Ethanol (g/mL) 16.0 0.998943 0.79283 17.0 0.998774 0.79198 18.0 0.998595 0.79114 19.0 0,998405 0.79029 20.0 0.998203 0.78945 21.0 0.997992 0.78860 22.0 0.997770 0.78775 23.0 0.997538 0.78691 24.0 0.997296 0.78606 25.0 0.997044 0.78522 At this temperature, the density of pure water is Select v g/mL while the density of pure ethanol is Sclect g/mL. The mass of solution used in this experiment is ISclect] grams. The density of the mixture is therefore Select] Yig/mL. The mixture must, contain | Select] ethanol.
Question 8 A student was experimenting with density to find the percent composition of an unknown mixture of ethanol and water. He found the mass of a beaker to be 25.439 g and then pipetted exactly 10.000 mL of his mixture into it with a volumetric pipette. The combined mass of the beaker and solution was 34.992 g. The experiment took place at 20.0°C Temperature (C) Density Water (g/mL) Density Ethanol (g/mL) 16.0 0.998943 0.79283 17.0 0.998774 0.79198 18.0 0.998595 0.79114 19.0 0,998405 0.79029 20.0 0.998203 0.78945 21.0 0.997992 0.78860 22.0 0.997770 0.78775 23.0 0.997538 0.78691 24.0 0.997296 0.78606 25.0 0.997044 0.78522 At this temperature, the density of pure water is Select v g/mL while the density of pure ethanol is Sclect g/mL. The mass of solution used in this experiment is ISclect] grams. The density of the mixture is therefore Select] Yig/mL. The mixture must, contain | Select] ethanol.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section: Chapter Questions
Problem 15QRT: Beakers (a), (b), and (c) are representations of tiny sections (not to scale) of mixtures made from...
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![Question 8
A student was experimenting with density to find the percent composition of an unknown mixture of
ethanol and water. He found the mass of a beaker to be 25.439 g and then pipetted exactly 10.000
ml of his mixture into it with a volumetric pipette. The combined mass of the beaker and solution
was 34.992 g. The experiment took place at 20.0°C.
Temperature (C)
Density Water (g/mL)
Density Ethanol (g/mL)
16.0
0.998943
0.79283
17.0
0.998774
0.79198
18.0
0.998595
0.79114
19.0
0.998405
0.79029
20.0
0.998203
0.78945
21.0
0.997992
0.78860
22.0
0 997770
0.78775
23.0
0:997538
0.78691
24.0
0.997296
0.78606
25.0
0.997044
0.78522
At this temperature, the density of pure water is
Select
g/mL while the
density of pure ethanol is Sclect
g/mL. The mass of solution used in this
experiment is [Sclect]
grams. The density of the mixture is therefore
[Select ]
Yg/mL. The mixture must.contain
Select)
ethanol.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fabf02933-ad72-4ca8-ae5d-beefed327923%2F4241822b-6813-4321-8bef-6fe337d2ed19%2Fj5vje0p_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Question 8
A student was experimenting with density to find the percent composition of an unknown mixture of
ethanol and water. He found the mass of a beaker to be 25.439 g and then pipetted exactly 10.000
ml of his mixture into it with a volumetric pipette. The combined mass of the beaker and solution
was 34.992 g. The experiment took place at 20.0°C.
Temperature (C)
Density Water (g/mL)
Density Ethanol (g/mL)
16.0
0.998943
0.79283
17.0
0.998774
0.79198
18.0
0.998595
0.79114
19.0
0.998405
0.79029
20.0
0.998203
0.78945
21.0
0.997992
0.78860
22.0
0 997770
0.78775
23.0
0:997538
0.78691
24.0
0.997296
0.78606
25.0
0.997044
0.78522
At this temperature, the density of pure water is
Select
g/mL while the
density of pure ethanol is Sclect
g/mL. The mass of solution used in this
experiment is [Sclect]
grams. The density of the mixture is therefore
[Select ]
Yg/mL. The mixture must.contain
Select)
ethanol.
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