Ap_0809_mmvl_g6 page history last edited by hunter horsley 9 years , 2 months the following uses the data collected and calculated in the lab to determine the molecular molecular mass of the volatile liquid 4) calculated molecular mass of volatile liquid molecular mass = [(mass. Objective the molecular weight (molar mass) of a volatile liquid will be determined by measuring what weight of vapor of the liquid is needed to fill a flask of known volume at a particular temperature and pressure. Molecular weight of a volatile liquid-lab report as the relative molecular mass of a liquid increases, or the mass of the liquid drop increases, the number of molecules it contains decreases. The objective of this experiment is for students to use the formula for calculating molar mass and the ideal gas law to determine the molar mass of an unknown volatile liquid.
In order to identify new materials, scientists use a variety of chemical and physical methods to determine molecular masses one of these methods includes the dumas method for determining the molecular weight of a volatile liquid. Experiment 8: molecular weight of a volatile liquid introduction: determination of the molecular weight of a volatile liquid by the dumas method. Molecular weight of a volatile liquid objectives to determine the molecular weight of a volatile liquid discussion using the density of the liquid and its molecular weight, calculate an approximate value for b. Molecular weight of a volatile liquid 1991 ap exam lab question in this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. So we did a lab to determine the molecular mass of a volatile liquid and in the handbook it says to use m=(grams of gas x rt)/pv my measurements are 12 g gas, 80 ml volume, 305 barometric pressure and the temperature of 104c when i use this to calculate the mass (after the. Gena gorin block v chemistry sl 31 october 11lab 9 - molecular mass of a volatile liquid purpose: to determine the molecular mass of ace.
Determine the molar mass of a volatile liquid use the ideal gas law in connection with an experiment background: ideal gas law a volatile liquid knowing the mass and the number of moles will allow us to compute the molar mass of the liquid. 37 ap chemistry lab molecular weight of a volatile liquid theory: the ideal gas equation, pv = nrt, relates the volume, pressure, absolute temperature, mass and (ap chemistry lab molecular weight of a volatile liquidtheory. 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 231 g of the vapor of a volatileq2 liquid is able to fill a 498-ml flask at 100 c and 775 mm hg, what is the molecular weight of the liquid.
Molar mass of a volatile liquid 3 use the calculations from questions 1 and 2 above, along with the temperature of the boiling water bath and the barometric pressure of the room, to calculate the molar. By using the ideal gas law, the molecular weight of the unknown liquid can be calculated 26 experiment 2: molar mass of a volatile liquid out the top portion of the page you must show your setups, including units pay. In a dumas bulb a volatile substance is introduced after a few minutes when the liquid has evaporated, the bulb is sealed it is known that the initial weight of the bulb with air is $120468~\mat. Molecular weight of a volatile liquid pre-lab assignment (2 parts): part 1: after reading through the lab handout and procedures, answer the following questions in your lab notebook answer in complete sentences and show all work as appropriate.
To determine the molecular weight of volatile liquids using the dumas method mm from chem 120l at university of waterloo, waterloo.
The molar mass of a volatile liquid if the substance in question is a volatile liquid, a common method to determine its molar mass is to use the ideal gas law, pv = nrt because the liquid is volatile, it can easily be converted to a gas. The dumas method of molecular weight determination was historically a procedure used to determine the molecular weight of an unknown substance the dumas method is appropriate to determine the molecular weights of volatile organic substances that are liquids at room temperature. Molar mass of a volatile liquid chemistry lab report october 4th, 2009 molecular weight determination of isopropyl alcohol using the dumas method - copy magnesium oxide lab report molar mass volatile liquid_f09-1 chemistry lab report.
1 estimation of the relative molecular mass, m r, of a volatile liquid theory according to the equation of state of an ideal gas, the relationship. Determination of the molecular mass of a volatile liquid using the dumas method purpose: determine the molecular mass of your unknown liquid using the dumas method. Start studying chemistry to measure the relative molecular mass of a volatile liquid (using a conical flask and not syringe) niall learn vocabulary, terms, and more with flashcards, games, and other study tools. If 231 g of the vapor of a volatile liquid is able to fill a 498 ml flask at 100 degrees c and 775 mmhg, how do you calculate the molar mass of the liquid. Determination of molecular mass via the dumas method page 1 of 5 to determine the molecular mass of an unknown volatile liquid using the dumas method and the ideal gas law background: in the early 19th century, jean-baptiste dumas.