Question

48.64 50. 91 57.94 58.89 Mass of large test tube Mass of test tube with acetic acid Mass of test tube + acetic acid + sample Mass of test tube + acetic acid + sample 2 C. Solution 2 C. Solution l Time C, Acetic Acid 57.48 40.3 33. 24.8 17.1 F12.5 9.8 57.2 38.4 24.8 13.2 10.9 G8.0 266 la 5 20.9 16. 6 16.7 14.3 10.0 0 0.5 1.0 1.5 2.0 2.5 5.7 4.2 3.9 3.1 2 2 1-5 6.0 3.0 3.5 4.0 3.6 8.9 8.9 8.7 8.4 4.0 4.5 13.4 13. 0 R.8 12.8 12.5 12.1 2.0 12.1 5.0 5.5 6.0 6.5 7.0 12 7.5 8.0 8.5 9.0 9.5 7.2 10.0 11.8 0 minutes) Freezing Points, as determined from graphs: Pure acetic acid: Solution 1: Solution 2: Calculation of Molar Mass Solution Solution 2 Mass of unknown used (total amount) g Mass of acetic acid used g Freezing point depression (AT;) °C Molality of unknown (Kf for acetic acid = 3.90 °C/m) m m moles of unknown in solution mol mol Molar mass of unknown g/mol g/mol Average molar mass g/mol Unknown Number Freezing Points, as determined from graphs Solution 1: Solution 2: Pure acetic acid: Calculation of Molar Mass Solution 1 Solution 2 Mass of unknown used (total amount) Mass of acetic acid used Freezing point depression (AT:) °C Molality of unknown (Kr for acetic acid 3.90 °C/m) moles of unknown in solution mol mol Molar mass of unknown g/mol g/mol Average molar mass g/mol Unknown Number OE Temperatirue in C Temperature in C Cofnesty :hec Abele an, ep loving JPto uo Excel File Edit View Insert Format Tools Data Window Help 87% Mon 4:3 Book2 ne Insert Draw Page Layout Formulas Q-ch Se Data Review View Chart Design Format Calibri (Body) 10 Sha NACKNONS ap Tet Ceneral Insert Merge&Center Delete CHEWY Cel n ble Syles Format Fin & Selecn G H K L N P Solution 1 Chart Area Solution 2 70 20 60 60 S 50 40 30 30 20 20 10 1C 0 05 1 15 2 2.5 3 35 4 45 5 55 6 65 7 75 8 85 9 95 10 00.5 1 15 2 25 3 35 4 45 5 55 6 65 7 75 8 85 995 10 TIME Time Acetic Acid Solution 1 Acetic Acid Solution 2 Sheet dy Mass of test tube with acetic acid 50. 91 57.94 58.89 Mass of test tube + acetic acid + sample 1 Mass of test tube + acetic acid +sample 2 g Time C, Acetic Acid C, Solution 1 C, Solution 2 0 5g.0 26 6 la 5 20.9 16. 6 16 7 14.3 10.0 5. 8 40.3 33. 24.8 57.2 384 Z4.8 13.2 10.9 0.5 1.0 1.5 2.0 tl 9.8 2.5 5.7 4.2 3.9 3.1 2.2 1-5 6.0 3.0 3.5 4.0 3.6 8.9 4.5 13.4 13. O R.8 12.8 12.5 12.1 12.0 2.1 5.0 5.5 87 8.4 6.0 6.5 7.0 7.5 3 8.0 8.5 2 9.0 9.5 7.2 .9 11 3 100 NNNK

Answer 1

pure Acetic Acuid SAlu tio A Sa lutibv B reeriy peint o puse Acetic Acid ts.3 C - 20- freesuy poiul ot sSol A lo ac lo freeeiu paint of sol -9:3 c 4 2 4 Time n Termp 5.)

freezing pout fom haph 15.3 C Rure Acetic Auid lo 3'c 9.3 c Solutuo u 1 solution 2 Souition A Solutiou & (57.24-35.s4) Mass o unlcuown used 56.39 55 S4 0.&5m wib t (55.5u-54) 1 (55.54 Mass of Acetic Aeid (ES.th- 7-97 gm freering poivt 15.3-10.3) Is.3-9-3 deforessiou =6°C ?, S 1 28 1 Molatiltty of uukuoun 1m) 1 3.90 hS.l 3.90 moles ol uukuown X1.28 = 0.0102 3Xhs. c0o 0.012 loo0 Molar Mass of uutuou 0.es 1.7 (u1.gm 83.3 3m O.0102 Avergge molaY mass 83.3 m tlu1.6sm 112 48 gm formula Iusedl mass o Unkuowns mass ol test tube t (macs of + Acetic Acid kst tube Acetic Acid +cample 4/2 1/2 freeziny poiut de oress ion AT Thcetic AcidTsoluhan 2 AT moles ol uneuoun = Mxwto Acetic Acid (k)