Chem. II Lab- Molecular Weight of a Volatile Liquid

Chem. II Lab- Molecular Weight of a Volatile Liquid - Lab...

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Lab Report Devon Corcoran Chem. II Lab Dr. Ward Molecular Weight of a Volatile Liquid Introduction The Ideal Gas Law, PV=nRT , where P is the pressure in atmosphere, V is the volume in liters, n is the moles of gas, R is the Ideal Gas Law constant molK Latm 08206 . 0 , and T is the temperature in degrees Kelvin, can be used for many practical applications. Knowing P,V,R, and T, we can solve for n. n is not equal to the molar mass, but is related to the molar mass in the form of M g n = , where M is the molar mass. So, using the value of n and the number of grams from an experimental measurement, we can find the molar mass of the volatile liquid. The objective of the experiment, Molecular Weight of a Volatile Liquid , is to make use of the ideal gas law to determine the molar mass of an unknown liquid. Experimental A 250 mL Erlenmeyer flask was weighed to as many decimal places as possible and recorded on the data sheet as M 1 . A utility clamp was places on the Erlenmeyer flask, and it was immersed as deeply as possible into a large beaker, the neck of the flask allowed to stick out of the top of the beaker. Distilled water was poured into the beaker around the flask such as to leave room for the water to boil vigorously. A few boiling chips were added into the water, and the water was
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This note was uploaded on 08/30/2011 for the course SCIENCE 1001921 taught by Professor Staff during the Spring '08 term at LSU.

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Chem. II Lab- Molecular Weight of a Volatile Liquid - Lab...

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