Rainbow Lab
CLASS COPY
Objectives:
1. Develop skills measuring chemicals with a graduated cylinder.
2. Practice using the metric system.
3. Test precision and ability to follow directions.
4. Practice lab safety procedures.
Materials:
6 Test tubes labeled A, B, C, D, E, F
Test tube rack
2 graduated cylinders (10mL and 25mL)
2 beakers
Beaker with red liquid
Beaker with yellow liquid
Beaker with blue liquid
Goggles
Paper towels
Procedure:
Part 1 :
Before you begin, put your goggles on and do not remove them until you
walk out the classroom.
1. Label 6 test tubes in order: A, B, C, D, E & F.
2. Fill a beaker half full with water. Use this to rinse your graduated cylinder
and test tubes.
3. The second beaker is for waste water.
4. Measure 21 mL of RED liquid using the graduated cylinder and pour into test
tube A.
5. Rinse the graduated cylinder with your water and pour the waste into your
waste beaker.
6. Measure 17 mL of YELLOW liquid and pour into test tube C.
7. Measure 21 mL of BLUE liquid and pour into test tube E.
Part 2:
Rinse the graduated cylinder with clean water between each measurement.
1. From test tube C, measure 4 mL and pour into test tube D.
2. From test tube E, measure 7 mL and pour into test tube D. Swirl.
3. From test tube E, measure 4 mL and pour into test tube F.
4. From test tube A, measure 7 mL and pour into test tube F. Swirl.
5. From test tube A, measure 8 mL and pour into test tube B.
6. From test tube C, measure 3 mL and pour into test tube B. Swirl.
7. Measure the contents of each test tube and record how many
mL are in each test tube in your data table. Also, record the color in each test
tube.
8. Create a bar graph of your results. Use color for each respective test tube.
Rainbow Lab
Table 1: Test Tube Results
Test Tube
Color of Liquid
Amount of Liquid FINAL (mL)
A
B
C
D
E
F
Make a bar graph of your final results and tape under this sheet into your NB.
Analysis/Results:
1. Name the colors that you created from the primary colors given to you.
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
2. How many mL of A,C, and E were in each test tube after part 1?
_____________________________________________________________________
_____________________________________________________________________
3. What would have happened if your measurements were not correct after part 1?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
4. Look at your hands. Do you have any stains on your hands? How about your lab sheet?
What are the implications if those stains represent chemicals that would be on your
skin right now!
_____________________________________________________________________
_____________________________________________________________________
5. How many mL of liquid/test tube did you have at the end of the lab? (check table)
How many mL/test tube SHOULD you have ended up with at the end of the lab?
6. What are some reasons why you may have more or less than when you started?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
Conclusion: In a paragraph (3-5 sentences), explain the purpose(s) of the lab, what you
did, and what lab safety skills were learned.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________