Experiment 5.1 Post Lab
Purpose

What was our purpose of the lab?
1. Separate the mixture using fractional distillation.
2. Identify the substances in the mixture by finding their
properties.
Data Table - Color
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Data Table - Odor
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Odor
Alcohol –
Medium
Alcohol –
Strong
Alcohol –
Medium
None
Data Table - Flammability
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Odor
Alcohol –
Medium
Alcohol –
Strong
Alcohol –
Medium
None
Flammability
Yes
Yes
Yes
No
Data Table - Density
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Odor
Alcohol –
Medium
Alcohol –
Strong
Alcohol –
Medium
None
Flammability
Yes
Yes
Yes
No
Density
~0.91 g/ml
~0.81 g/mL
~0.93 g/mL
~1.00 g/mL
Did your density match these? If not, why?
Data Table – Boiling Point
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Odor
Alcohol –
Medium
Alcohol –
Strong
Alcohol –
Medium
None
Flammability
Yes
Yes
Yes
No
Density
~0.91 g/ml
~0.81 g/mL
~0.93 g/mL
~1.00 g/mL
Boiling Point
~80°C and
~100°C
~80°C
~80°C and
~100°C
~100°C
Data Table - Solubility
Property
Solution
Fraction 1
Fraction 2
Fraction 3
Color
Clear
Clear
Clear
Clear
Odor
Alcohol –
Medium
Alcohol –
Strong
Alcohol –
Medium
None
Flammability
Yes
Yes
Yes
No
Density
~0.91 g/ml
~0.81 g/mL
~0.93 g/mL
~1.00 g/mL
Boiling Point
~80°C and
~100°C
~80°C
~80°C and
~100°C
~100°C
Solubility
Yes
No
Yes
Yes
Problems/Improvements with the Lab
 Was
your data near the “correct” data? If it wasn’t,
think of three reasons as to why it wasn’t.
Summary Questions

Based on the data, what 2 substances were mixed together in the mixture?
 Water – That’s the easy one.
 Alcohol – Yes, but what alcohol because there are lots of different types of
alcohols?

We need to consult a table that has the properties of various alcohols.
 Turn to page 65 in the book.
 Based on the table, what alcohol do you think it is?

Water and isopropanol are the 2 substances in the mixture.
Post Lab

Pre Lab

Completed Data Tables (3 of them – properties table, 2 BP tables)

Calculations (How did you figure out your densities)
Post Lab

Graphs
 Mixture will have a graph by itself
 The 3 fractions should be on the same graph
 Labeled in the legend by different colors.

Questions (on website)
Post Lab

Conclusion (Complete summary of the lab)



First paragraph
 What did you do in the lab, what did you learn?
Second paragraph and Third paragraph. (One for each of the purposes)
 Did you accomplish your purposes?
 How do you know?
 Claim saying what you think the liquids in the mixture were. Evidence from your
data backing up your claim. Reasoning is a justification that links the claim and
evidence and includes scientific principles to defend the claim and evidence
Fourth paragraph – Improvements and sources of error for the lab (what did you
do wrong that you can improve upon for the sludge test.