Distillation Lab Notes
Groups of
3
Group roles:
1- Wise old scientist # 1
- writes down step by step procedure
- helps scribe # 2
- checks measurements made by action hero
2- Wise old scientist # 2
- draws distillation apparatus
- puts data into a chart as it is being collected
- helps scribe # 1
- checks measurements made by action hero
3- Action hero
- sets up distillation apparatus
- monitors progress of distillation
- makes all measurements (mass & volume)
Every group member cleans up!
Data you will be responsible for collecting during the lab:
Bold words = measurements you should make in lab
Bold & underlined words = calculations you should make at home
A. Starting volume of the soda (from label)
B. Volume of sugar syrup (distillate)
1. After heating, fill up soda can with water from graduated cylinder.
2. Subtract starting volume of soda from volume from graduated cylinder
C. Volume of water condensed in beaker (condensate)
1. Measure in a graduated cylinder (more precise!)
D. Density of soda before heating
1. Measure mass of soda can before opening
2. Measure mass of empty soda can
3. Subtract mass of empty soda can from mass of soda can before opening
E. Density of sugar syrup (after heating)
1. Measure mass of soda can after heating (with sugar syrup)
2. Subtract mass of empty soda can from mass of soda can after heating
3. Divide by volume of sugar syrup
F. % Yield
1. Volume of water from graduated cylinder in step B-1 is your theoretical yield
2. Volume of water condensed in the beaker is your actual yield
3. Actual/Theoretical = % yield
I suggest making four charts:
1- All mass measurements
2. All volume measurements
3. A density chart (show all measurements used to calculate each density)
4. A % yield chart (show all measurements used to calculate % yield for each distillation you do)
Distillation Lab Report – Expectations & Grading Rubric
 Each group member turns in their own lab report!
 Lab report counts as a quiz grade!
 Lab reports should be addressed to President Bush
 Lab report is due THIS FRIDAY 10/27/06
 Lab report must be typed!
Introduction 20%
In a well written paragraph, address the following questions:
- Why did we do this lab? How does it relate to what we are talking about in class?
- What were the independent variables?
1. _________________________________________________________________
2. _________________________________________________________________
-
Explain why these are independent variables. Mention the definition of an independent
variable.
What were the dependent variables?
1. _________________________________________________________________
2. _________________________________________________________________
-
3. _________________________________________________________________
Explain why these are the dependent variables. Mention the definition of a dependent
variable. Why do I care about these dependent variables and not others?
Materials
10%
List all materials used in lab. In addition to this list, use a full page to draw (that means different
colors!!!) your distillation apparatus. Completely label this drawing.
Procedure
20%
In well written paragraphs, lead President Bush through each and every step of your lab. Remember,
this is our president. His GPA at Yale never made it above a C.
Results
10%
No paragraphs in the results section! You will only include charts – but not the same one you have in
your lab notebooks. We will talk about what your results sections should look like on Wednesday.
Discussion
20%
Look back at all the observations you made in your lab notebook while you were doing this lab. You
should now rely on these to talk about the strengths of your procedure. If you made an improvement
during the lab, mention that. If you thought of one as you are writing this lab report, make that clear.
You should also mention that you are using data from your classmates here.
Conclusion
20%
Were your dependent variables ( __________________________ , _________________________ and
______________________) affected by changes in your dependent variables
(___________________________ and _____________________________). Yes? No? Either way,
support your conclusion with numbers from your results section and observations from your discussion
section.