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