Project #84760 - DENSITY OF ETHANOL AND WATER MIXTURES (20°C)

Density of ethanol and water mixtures (20°C)

Ethanol

(%)

Density

(g/cm3)

Ethanol

(%)

Density

(g/cm3)

Ethanol

(%)

Density

(g/cm3)

0

0.998

34

0.947

68

0.872

2

0.995

36

0.943

70

0.868

4

0.991

38

0.939

72

0.863

6

0.988

40

0.935

74

0.858

8

0.985

42

0.931

76

0.853

10

0.982

44

0.927

78

0.848

12

0.979

46

0.923

80

0.843

14

0.977

48

0.918

82

0.839

16

0.974

50

0.913

84

0.834

18

0.971

52

0.909

86

0.828

20

0.969

54

0.905

88

0.823

22

0.966

56

0.900

90

0.818

24

0.964

58

0.896

92

0.813

26

0.960

60

0.891

94

0.807

28

0.957

62

0.887

96

0.801

30

0.954

64

0.882

98

0.795

32

0.950

66

0.877

100

0.789

 

 

PROCESSING THE DATA

1.   After finding the mass of the distillate by subtracting the mass of the graduated cylinder from the mass of the graduated cylinder + distillate, calculate the density of each fraction using the formula: density = mass/volume.

2.   Using the density table above, determine the % ethanol corresponding to the density of each fraction. Record these values.

3.   Using the values of % ethanol obtained in the previous step, determine the % water for each fraction.

4.   What is the primary component of the first fraction you collected? Explain why it is not pure.

5.   Did the density of the fractions increase or decrease as the experiment progressed? Explain.

6.   What happened to the % of ethanol in the collected fractions as the experiment progressed? What happened to the % of water?

 

7.   What could be done to subsequently increase the purity of the ethanol (reduce the water) in the first fraction? Explain.

Subject Science
Due By (Pacific Time) 10/02/2015 12:00 am
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