Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Please show the calculation (and answer) for the actual volume of hydrogen gas collected, corrected to STP conditions for trial 1.
Transcribed Image Text:Purpose: The purpose of this lab is to determine the percent yield of hydrogen gas produced in the
reaction of magnesium solid with hydrochloric acid under conditions of Standard Temperature and
Pressure (STP).
Directions: Begin by printing out the Generating Hydrogen Lab (pdf file) posted below, and read
the introduction. Please watch the videos posted below, which will show you how the experiment
was done and also explain the calculations needed in this lab exercise. The video explaining the
calculations uses the data given in the lab manual, not the actual data from performing the
experiments. Make sure to use the data given below as your data for trials 1 and 2.
TRIAL 1 (from the 3-part video):
Mass of Mg: 0.083 g
Volume of H2 in cylinder: 73.2 mL
Temperature of H2 gas: 298 K
Barometric Pressure: 761 torr
TRIAL 2:
Mass of Mg: 0.066 g
Volume of H2 in cylinder: 62.0 mL
Temperature of H2 gas: 295 K (note a different temperature here, so there will be a different vapor
pressure of water in trial 2).
Barometric Pressure: 762 torr
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