Lab 1 - Intro to the Laboratory

Lab 1 - Intro to the Laboratory - Anil Kanungo BIO 206L...

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5/7/2009 Anil Kanungo BIO 206L Thursday 6-10pm Lab #1: Introduction to the Laboratory Introduction: This lab session was designed to educate on standard lab procedures especially with taking measurements. It also covered the data recording and report making procedures including work with graphs, tables, and word processing. Materials: Tape Measure 1 mL pipette 5 mL pipette 10 mL pipette Pump pipetter 1000 μL Micropipetter and tips Plastic containers filled with colored water 100 mL graduated cylinder 100 mL beakers, empty and labeled “for collection” 125 mL Erlenmeyer Flask Weighting boats 10g of NaCl in plastic containers Weighing spatula Human skeleton Procedures: The bulk of the lab procedures consisted of measuring. We always made sure that the scale and weigh boats were clean when measuring mass, made sure to get as close as visually possible to the measuring marks when measuring volume, and made sure that the tape measure was flat and straight when measuring length. We also took care in disposing waste and cleaning equipment. The entire group participated in practicing measuring and using equipment and much of our tabular and graphic work was done together in class. Results and Analysis (individual) : Exercise 1: Measuring Mass 6.) The total mass was expected to be 52 g, however, the actual mass was 54.68 g. This may be because the water was not pure and may have additional substances in it. Also, inaccurately measuring the NaCl may have affected how much was mixed into the H 2 O. Exercise 2: Practice Measuring Volume A.) Micropipetter Data: Mass of 800 μL Measured on an Electronic Balance Mass 1 0.80 Mass 2 0.81 Mass 3 0.77 Mass 4 0.80 Mass 5 0.79 Mass 6 0.80 Mass 7 0.80 Mass 8 0.81 Mass 9 0.81
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