1. Develop Skills Measuring Chemicals with a Graduated Cylinder

Name ______Date ______Period______

Rainbow Lab

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

Graduated cylinder

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. Measure21 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. Measure21 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 manymL are

in each test tubein 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.

Table 1: Test Tube Results

Analysis/Results:

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Name ______Date ______Period______

1. Name the colors that you created. ______

2. Why is it important to follow directions exactly? ______

6. How many TOTAL mL of liquid did you have at the end of the lab? ______mL

How many should you have?______mL

Hint: Do the math!

7. What are some reasons why you may have more or less than when you started with? ______

Conclusion:In a paragraph, explain what you learned about safety in the laboratory and the importance of following directions and working with your classmates.

______

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