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Unformatted text preview: the proper containers in the set- up area. Prior to Class
Please read Lab Safety. Please read the following sections in Lab Equipment: Analytical Balance and Graduated
Cylinder under Volumetric Glassware. Please review the following videos: Safety and Analytical Balance. Lab Procedure
Please print the worksheet for this lab. You will need this sheet to record your data. Part A: How Big is a Mole?
Obtain a small beaker and a jar of popcorn from the set- up area. If you have a watch with a second hand use it
as your timer or use the clock on the wall in the lab.
One person should act as the counter, the other as the timer. When the timer signals, the counter should start
counting kernels, dropping them into the beaker one at a time. At the end of 30 seconds, stop counting and
record the count in Table A.
Repeat the experiment three more times, switching jobs as counter and timer for each trial. Record the results in
Calculate the average number of kernels counted in the four trials, and enter the value in Table A. Part B: Molar Mas s es (Counting by Moles )
Determine the mass o...
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- Spring '14