By William L. Masterton, Emil Slowinski, Wayne C. Wolsey
CHEMICAL rules within the LABORATORY, 8th variation maintains to construct on its strengths by means of basically featuring the elemental ideas of chemistry. The lab guide maintains to keep up the top of the range, time-tested experiments and strategies that experience develop into hallmark positive aspects in the course of the lifetime of this title.
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Extra resources for Chemical Principles in the Laboratory (8th Edition)
Using the data you have obtained and the relevant equations, calculate P1 and Pbar. 57. Report the value of P in both sets of units. Compare the value you obtain with that found with the barometer in the laboratory. Complete all of your calculations before leaving the lab. When you are finished, turn off the digital thermometer if you have one and return all of the borrowed equipment to the stockroom. Name ____________________________________ Section _________________________________ Experiment 8 Data and Calculations: Verifying the Absolute Zero of Temperature Determination of the Barometric Pressure A.
In the beaker you now have the metallic copper produced in the reaction, in a solution containing an aluminum salt. In the next step we will use a Buchner funnel to separate the copper from the solution. Weigh accurately a dry piece of filter paper that will fit in the Buchner funnel, and record its mass. Put the paper in the funnel, and apply light suction as you add a few mL of water to ensure a good seal. With suction on, decant the solution into the funnel. Wash the copper metal thoroughly with distilled water, breaking up any copper particles with your stirring rod.
The cross sectional area of the manometer tube is found in a similar way. Fill the manometer with water, using your finger to stopper the tube as necessary. Pour the water into a tared small beaker and record its mass, and hence its volume. Then measure the lengths of the arms of the manometer, and the length of the U as π × r, the radius. The length of the manometer is the sum of these lengths. Use the length and volume to find the cross sectional area A in cm2. Using the data you have obtained and the relevant equations, calculate P1 and Pbar.