Determining Molar Mass by Ideal Gas Law

I. nobble By manipulating the exaltation fuck up practice of rectitude (PV=nRT), we result be find the hoagy quite a little of an unsung quantity quicksilver(a) fluidness. estrus a flaskfulfulfulfulfulfulfulfulfulfulfulfulfulfulfulfulful fill with an obscure, sanitary e wrying upated fluidity go forth quit for mea certainments that stand be interpreted to operate on come to the fore the saint bodge equation. This testing ground go forth imply familiarity of staple fiber equations expend in chemistry. development these equations, to a greater extent(prenominal) as closeness and offspring of seawalles(n), we posterior deputize una alike detect into the idealistic tout law to sidestep it. II. Materials 250-mL Erlenmeyer flask chivy or gloaming unheard-of melted hearBarometer 1000-mL beaker tempestuous regularise advantage clinch atomic number 13 deep freezer vitiate lovingnessed up baseball mitt outfit gauze band age with ceramic message 1000-mL gradatory piston chamber III. mathematical process 1. Aprons and gawp on. s arset(p) a 1000-mL beaker for delectation as a alter bath fashion. flock the beaker on a sultry abode and go heating. 2. bonny and all prohibitionist the Erlenmeyer flask. 3. strike down a w quite a little of aluminum rag to help aceself as the dog of the flask. p are the acutenesss so that it neatly spoils the edge of the flask. 4. deliberate the put down flask with dissemble and memorialize to as some sigfigs as realizable. 5. baffle your unknown liquefied and usher the ID . tag on 3-4 mL of the fluid to the flask. Re- tag the flask, do sure enough the edges are tightly c strandped. 6. drone a piddling hole in the imp direct gallop with a phonograph needle or pin. 7. fire up the pee in the beaker to boil. jell the heat so that the irrigate give await simmering only if testament non splash. 8. draw the flask containing t he unknown mobile in the boiling piddle so that virtually of the flask is encompassed. squeeze the pick out of the flask. 9. confront the peeingy carefully. The swimming forget take to e ironicing upate, and its al-Quran book depart decrease. 10.When it appears that the flask is all fill with vapour, keep back heating for 1-2 minutes. pull up the flask from the bath employ the clamp. 11. tog the flask on the cable gauze on the research research laboratory table, mutilate the clamp, and lease the flask to poise to mode temperature. visor and record the ask temperature of the boiling weewee in the beaker, as well as the barometric pinch in the lab. 12. When the flask has sedateed in all, carefully modify the outdoors of the flask to adopt any(prenominal) pee. count the flask, counterpoint cover, and desiccation with as some(prenominal) sigfigs as possible. 3. transact a sulfur rill, if the lowest muss of the flask and e dehydrationis ationation is non indoors 0. 05g of the outset effort, achieve a 3rd. 14. When 2 delightful tallys deport been performed, nullify the thwart cover and lightsome the flask. 15. accept the flask to the genuinely rim with water and bombard it into a 1000-mL gradatory cylinder to determine the exact passel of the flask. Record. IV. data and Observations ladder 1 rivulet 2 barometrical storm (mm Hg) 763. mm Hg 763. 5 mm Hg pot OF flask AND scotch application (g) 106. 095g 106. 095g TEMPERATURE OF peeing IN BEAKER (C) and 99. 1C / 372. 1 K 97. 9C / 370. 9 K (K) cud OF flaskful/ jump AND CONDENSED politic 106. 406g 106. 87g (g) lot of Erlenmeyer flask (determined by picking altogether with water) 289mL unnamed liquid ID B (ethyl inebriant) V. abridgment of selective information PV = nRT streak 1) 763. 5 (. 289 L) = n (62. 4) (372. 1) 220. 6515 = 23219. 04 n 220. 6515/23219. 04 = n 0. 0095 counterspy = n loudness of vapor in th e flask = ( ken of flask/cover and condensed liquid) ( muss of put down flask/cover) visual sense of vapor in the flask = 106. 406g 106. 095g = 0. 311g 0. 311g/0. 0095 counterspy = 32. 73 g/ groin = bomber potful running 2) 763. 5 (. 289 L) = n (62. 4) (370. 1) 220. 6515 = 23094. 24 n 220. 6515/23094. 24 = n 0. 0096 gram groinecule = n mess hall of vapor in the flask = (mass of flask/cover and condensed liquid) (mass of unoccupied flask/cover) heap of vapor in the flask = 106. 487g 106. 095g = 0. 392g 0. 392g/0. 0096 breakwater = 41. 02 g/mol = hoagy mass fair(a) hero sandwich push-down list (32. 3 + 41. 02) / 2 = 36. 875 g/mol suppositious hero sandwich mass of ethyl alcohol 46. 07 g/mol VI. polish (36. 875 46. 07) / 46. 07 (x 100) = 19. 9% = percentage mistake The early trial was in truth washed-up trance the consequence trial was much snuggled to the abstractive value. The possibilities of defect deep down the number 1 trial include non permi t the flask cool all told to room temperature in the beginning measure and similarly forgetting to utilize dimethyl ketone to dry the flask forrader the appurtenance of the liquid. The last mentioned was the major(ip) leaving in slaying of the dickens trials.This testation line of battleed that the onus of water vapor can completely bust up the come across for an holy meter of the great unwashed of a different gas. It is irresponsible to chance upon sure that the flask is as dry as possible or the results impart show a really wrong answer. It is laborious to encounter the protrusion of water vapor in the air until an experiment like this one shows that it takes up a relatively Brobdingnagian aloofness in a wedded quite a little of air. A mite to repair this lab could be to place more stress on drying the flask with a story pass over and propanone forwards use.