1.4.4: Length

D. Length

1. Add 2.0 mL of deionized water to a 10.0 mL graduated cylinder using a wash bottle. The bottom of the lower meniscus should be at 2.0 ml mark. Pour the liquid into a large test tube. Mark the height of water in the test tube with a small piece of tape. With a ruler, measure the height of water in the test tube in cm.

2. Add 2.0 mL of water in a 10.0 mL graduated cylinder. Pour it into a small test tube. Mark the height of water in the test tube with a small piece of tape and with a ruler, measure the height in cm.

3. In the future, you will often find it convenient to simply estimate volumes of 1.0 to 2.0 mL simply by observing the height of the liquid in the test tube. So, save the little pieces of tape on the test tube and have your instructor sign off your report.             

Observations:

Read the ruler to the nearest 0.01 cm. The length measurements should have three significant digits: two certain and one uncertain digit.

Height of 2.0 mL of water in a large test tube                                               ------------------cm

Height of 2.0 mL of water in a small test tube                                              ------------------cm       

Instructor signature                                                                                    -----------------------