Molecular weight of a volatile liquid 1 name lab partner(s) section date molecular weight of a volatile liquid objective in this experiment the molecular weight of a volatile liquid will be determined by equals mass, m, divided by the molecular weight, mw. Experiment we will use a modified version of his technique to determine the molecular mass of an unknown volatile liquid determination of molecular mass via the dumas method page 4 of 5 if there is a barometer in your laboratory room. Chem-01a lab, fall 2011 molar mass of a volatile liquid 4 figure 1 apparatus for determination of the molar mass of a volatile liquid most of the flask containing (chem-01a lab, fall 2011 molar mass of a volatile liquid mola. The molar mass of a volatile liquid will be determined by measuring what mass of vapor of the liquid is needed to fill a flask of known volume at a particular temperature and pressure introduction.
Acetone is a colorless liquid used as a solvent and an antiseptic it is one of the ketone bodies produced during ketoacidosis from mesh acetone is a colorless, volatile, flammable organic solvent acetone occurs naturally in plants, trees. The determination of molar mass of gases and volatile liquids classic lab kit for ap chemistry teaches students to compare the molar mass of specific gases by comparing masses of equal volumes of gases at the same temperature and pressure. Determination of the molar mass of a volatile liquid background it is often useful to know the molecular mass of a substance since it is one of the properties that help characterize the substance. Mise - physical basis of chemistry third experiment molecular weight of a volatile liquid purpose: the purpose of this experiment is to determine the molecular weight of a compound that is a volatile liquid by divide the mass of the water by it.
Chemistry 212 molar mass of a volatile liquid using the ideal gas law learning objectives to study the ideal gas law to determine the molar mass of a volatile liquid. The molar mass and volume of a gas by: jessie kim 12/21/12 purpose: the purpose of this lab is to determine the molar mass of an unknown volatile liquid (either ethanol or isopropyl alcohol) and volume of two different gases produced in a lab. The objective of this lab is to experimentally determine the molar mass of an unknown and volatile liquid by narendran in types research science.
The classic dumas method (named after french chemist, jean baptiste andr dumas (1800-1884)) for determining the formula weight of a volatile liquid is a case in point. Would the following actions increase, decrease, or have no effect on the experimental molar mass explain a the flask was kept in the hot water bath after all the liquid had vaporized b the exterior of the flask was not dried before the final weighing with the condensed vapor. Ap chem name_____ lab- molar mass of a volatile liquid (modified from slowinski and bernstein) introduction: the purpose of this experiment is to experimentally determine the molar mass of the vapor of a volatile. Determining the molar mass and the likely identity of an unknown volatile liquid out of two possible. Teacher's manual 3 determination of molar mass by vapor density overview objectives in this lab, students determine the molar mass of the volatile liquids ethanol and.
Suppose the volatile liquid has a vapor pressure of 105 kpa at room temperature how would this change the value of the molar mass that you calculated in question #1.
1suggest how you could perform the experiment on an unknown liquid that boiled at 120c, keeping setup of the experiment essentially intact 2 when placed in the ice bath, did all of the vapor within the flask condense into a liquid explain your answer with respect to the concept of. The molar mass of a condensable vapor reading assignment: chang, chemistry, 10th edition 5-ml of a volatile organic liquid (methyl ethyl ketone or ethyl acetate) the molar mass of the liquid/vapor is then. 1 a 0678 gram sample of gas occupies 0214 l at standard conditions what is the molar mass of the gas since this is at standard conditions (0 c and 1 atmosphere of pressure, which is the same as 760 torr), you can do a more simpler calculation. Molecular weight of a volatile liquid in order to measure the molecular weight of a gas or vapor, we need simply to determine the mass of a given sample of the gas under known conditions of temperature and pressure if the gas obeys the ideal gas law. Determination of the molar mass of gases and volatile liquids ap chemistry laboratory #3 catalog no ap8814 publication no 10529a introduction the molar masses of compounds are used daily in the chemistry profession.