107 Exp 7 Lecture

107 Exp 7 Lecture - CHEM 107 Experiment 7: Ideal Gas Law...

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CHEM 107 Experiment 7: Ideal Gas Law
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Precautions Two rubber tubings From stockroom One short and one long Rubber stopper with a glass tube Front in the lab Sulfamic acid Eye, mucous membrane and skin irritant Sodium nitrate Strong oxidizer
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Experimental Setting For one set, two people help each other. First one trial (all together) Calibrate pasteur pipet using a marker About ½ ml unknown into erlenmeyer flask Weigh empty flask first and both next 3 ml sulfamic acid into 1-dram vial Finish experiment and check V Adjust amount of unknown for less than V = 10 ml Second trials = individual
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Sources of Error Touching your Erlenmeyer flask Bubbles in system NOT ADJUSTING water level for atmospheric pressure Beginning and end of each run
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How to Read a graduated pipette 0.00 1.00 .10 .20 .50 Estimate the hundredths digit .60 0.50 0.04 + 0.54
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Ideal Gas Law PV=nRT Measure P, V, and T – Calculate n ( n = moles of N 2 gas) R=Ideal gas constant 0.0820575 L atm mol -1 K -1 T=temperature in Kelvin ( o C +298.15)
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This note was uploaded on 04/07/2011 for the course CHEM 107 taught by Professor Staff during the Winter '08 term at BYU.

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107 Exp 7 Lecture - CHEM 107 Experiment 7: Ideal Gas Law...

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