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Rainbow Lab

Rainbow Lab. Purpose: To investigate the importance of lab safety and accuracy. Rainbow lab. Objectives: Develop skills measuring chemicals with a graduated cylinder Practice use the metric system Test precision and ability to follow directions Practice lab safety procedures. PROCEDURE.

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Rainbow Lab

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  1. Rainbow Lab Purpose: To investigate the importance of lab safety and accuracy.

  2. Rainbow lab Objectives: • Develop skills measuring chemicals with a graduated cylinder • Practice use the metric system • Test precision and ability to follow directions • Practice lab safety procedures

  3. PROCEDURE • Part 1: begin the lab at step #4. If you over-measure, pipette out the extra fluid and return it to the original beaker • Part 2: • If test tubes are not labeled line them up so that you easily remember their order. • If the numbering on your test tube rack is different from the lab instructions, remember alpha order (A, B, C…) can be applied to nominal order (1, 2, 3..) so that A=1, B=2, C=3, D=4, etc. • For each test tube, when measuring the final volume, rinse out the graduated cylinder before measuring the next test tube.

  4. RESULTS- Write the question and answers • Which test tube had the greatest final volume? Answer A, B, C, D, E, or F • Which test tube yielded the lightest color? • Answer A, B, C, D, E, or F • Construct a model of your colored test tubes in the test tube rack below. Note: your drawing should resemble the sample below. YOUR COLORS SHOULD BE DIFFERENT

  5. Conclusion- Write the question and answers • Since the lab is titled “Rainbow Lab”, you should have gotten the main colors of the rainbow. What six colors are these? • Explain how your colors could have been different from a rainbow. Hint: Explain any errors • How could mis-reading the liquid level affect your results? Hint: Use the term ‘meniscus’ • If these colored liquids were biohazardous, what steps would you follow if you spilled some on yourself or the counter?

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