RiosJavier_Experiment 1 Measurement_06-Spr22

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School

California State University, Long Beach *

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Course

111A

Subject

Chemistry

Date

Dec 6, 2023

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pdf

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2

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Experiment 1, Measurement Name Javier Rios Student ID # 029223400 In this experiment you will practice using top loader balance for weighing objects, and volumetric pipet to transferring exact amounts of water from a beaker to a vial. A) A metal tag was weighed by your instructor three times: Tag # First try Second try Third try Average (A) 114-b 5.297 5.299 5294 | - Ei1 =|A First try]| - - 0.000 (E1) Error associated with the first try: 0.002 (E2) Error associated with the second try: 0.003 (Es3) Error associated with the third try: Show work for E1, E> and Es: 5.297-5.297 5.297-5.299 5.297-5.294 (AE) Average error: 0.002 AE = EitE2+Es _ 0.001+0.003+0.002/3=0.002 3 0.0377% (PAE) Percent average error: PAE=‘:£ x 100 0.002/5.297=3.77*10%-4*100=0.0377%
B) Your instructor will show you the proper technique of using volumetric glassware. Your instructor will also demonstrate how to use a pipet and for transferring 5 ml of water from a beaker to a vial. —> In Your own words wrile a procedure ON how 1 wse a pipet- (6 desailed Skeps) -attach the bottom of pipet to the pump -pump socks the water -Absorb a little bit more than 5mL -Take out the pump but put your finger where it was so it doesn't drop -let your finger go so water drops bit by bit and the water its at 5 mL -At last just let your finger go to transfer the water.
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