Simple and Fractional Distillation- Post Lab 7

Observation
1.       Fractional distillation took a longer time for the compound to start drop in the receiving flask than the simple distillation.
2.       After 6ml of distillate were collected during simple distillation it takes around 5 minutes for the next 1 mL distillate.
3.       After 4 ml of distillate were collected during fractional distillation it takes around 7 to 10 for the next few ml to distillate.
Data
Temperature        Volume (ml)
58
    1
56
  2
50
3
47
4
94
5
100
6
94
7
Temperature        Volume (ml)
1
60
2
65
3
73
4
78
5
85
6
96
7
98




Question
The two unknown are Heptane and hexane.
Simple distillation graph has a smoother curve which makes it harder to estimate the two boiling points. In fractional distillation you can estimate the two compounds boiling point better. You can do so because there are two plateau. The first plateau was followed by a significant increase in temperature then followed by a second plateau. Simple distillation also has a one step process whereas fractional distillation happens in several steps. In fractional distillation you first boil the liquid, collect the vapor and then condense it. This is why Fractional distillation is more efficient at separating liquids.

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