1C Han handout 9 key

1C Han handout 9 key - CLAS Chem 1C Handout 9 Ch 17...

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Unformatted text preview: CLAS Chem 1C Handout 9 Ch 17 Solutions (11447.7) 1. What is the vapor pressure of a solution prepared by dissolving 75.0 g of C6H1206 into 500 mL of water at 25 °C (at 25 °Cfthe vapor pressure of water is 23.8 tori)? l l . t We ‘ ‘ ' a ml C H o -.- 73-0 »— m-m— = _ m «we! aha “~3- j‘éSolvtn'l‘ psbfimar {9 (L 6 6 £806 0 Ll 1' WW‘ HID r gho- Lsm “ml .. L1‘YMU tho 1‘ 27‘? “'“l ' a 0.6%5 Mt x mu. 3' [2’63 _ 27.? + o-qr"? m»! l7 "- (ofissWKZ‘S-F law} :{zéa ham: 2. A solution is made by mixing 0.677 moles of propanol and 0.428 moies‘of methanol at 40 C’C. a. Calculate the vapor pressure of the solution given that the vapor pressures of pure memanol and propanol at 40°C are 303 and 44.6 torr. Assume ideal behavior. ' P v: ngi-h l :- txvm Pyle: l PFC) _ 0. G17 .. - 0"”9! —. - 2 0&6.“- chajvz {—9.428 . 0‘35?! 9a? m 6-677i~0-‘(1¢l" . :7: (newsman + (May «wt-Q r (was, 4w 1 b. What is'the mole fraction of methanol in the vapor above the solution? ; ? uni) Moll! Bit Wtan |:\ Vfif‘r __ Pmel-L‘ (o'gg1)(3°3\ “7-,; . * ' ‘ I a - ‘ . = = 0.81 M - 49+“ mule; RM \ra par “Hi-g lfl‘tvfle (oat?) sumo mat Mamet- Luz: a" hush—v“ W‘l‘" ‘firac'lfiu m h H“ Vfifér“ Jae 'H 6+: Puffin/fl . . - ‘ , Vé‘PN‘ -+l’\fi’- papa‘na! c. If the solution actually got warmer when the methanol and propanoi were muted, would you s - _ expect the solution to be ideal? ‘ " W “Hum Hilde. below As Sol‘n 504- werwr 7*") AT>O ‘nCr sol/,4 "".-""“-—~'“> Salt/HIV!» M wumlcl fwd-LIL.“ l‘ 0. *$fi%'m_ cieueh ‘1l'7 ‘u ,1 (final!!! Cm...) (13!“ féem> . TABLE 17.6 Summary of the Behavior of Various Types of Solutith Interactive Forces Between I . AT for Solute {A} and ‘ Solution- Deviation {mm SoiventlB} Particles AHsoln Formation Raoult’s Law Example AWABHBfiAMB Zero Zero ' ' 3 '_ I one {idealsolunon} Benze — ,A (—7) A, B (me E < A <—~——> B Negative (exothermic) Positive Negative Acet0::—::h:ene A <——~e A, B <—> B > A W B Positive (endothermic) ‘Negative Positive 3 er Ethanol—hexane 3. The vapor pressures of several sokutions of water and butanol were determined at various compositions and the data is given beiow: Xmo vapor pressure 0 47.0 0.27 52.5 0.58 - ,_ 58.3 0.72 46.9 I. 1.00 I 40.2 a. are the soiutions of water and butanol idea}? A 3‘3 Hzo - n o t b. predict how the temperature wouid change iwhen the water and propanol were mixed together? port'nh’ve iew'a-h “an 5*“) 4074 O (Capra air}; @{JM\ 0. which of the above solutions would have the lowest boiling point? “*5 “TV?” Wipof‘ Phantom w) [Bum-l [90:11‘113 yolh‘i“ 4_ Draw a phaSe diagram Show.ng how the addition of a solute changes the pure solvent. [rung SAW? 7 I , MW {rec HM) 9+ - :/ F Mioiwhbfl 7. n “I” T. ,l W,“ 3 1‘3 1F F K numi ‘ {refittka ('1‘ w W AT], 1" Tb! "" TL, 1* T T’” ' "r " _ F F k 5 MW burl-{rub pf Rnbmi Luunb 5'. Calculate the boiling point, freezing point and osmotic pressure at 25 °C of 25 g sugar w ‘ (Ceflzzos) dissolved in 50 g water (assume 50 mL of soiution). “2 9th,:- 0-§i°C/m ,. we K; : (.st 'C/m ' " \mi €190°C + i-‘VIZJ’C- I ‘ . I . r . z? w z. .i-é ° ‘ ' Aft. 2 A45 M «- (0(0-‘3 %\( “i :0 :50?) I 2 C [tom-42.0.; 9-05 6 (>11: . - wwi ' W - - Tr: .MRI (o( 9121* o.o%?ao(," e m K a 0.049 I» M”. K\( 3 6. Which of the following 1.0 m solutions has the highest boiling point? Rank them from lowest - I‘ g n .1 o .c *- o°c as-n'fi ._\KGM 2 —mt i-ss°%y M's/h) C" 1 C P H I} to highest. . " WK. hcl‘é 5n) ,, ; K 12"“ (36911206 CaCl; ' - - K3P04 CH3COOH HCl ‘V E: 6:13 (3:4 (<k‘<?- 5‘1 M iowed- CGH‘L06 I CLbcooH) Ha” CACJL/ 4K? {70“} Luhjksui‘ Which solution has the highest freezing point? A TIC = (—9" («F m r £26222? pi“ rs tower. Va‘wer °F 1 50 ...
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1C Han handout 9 key - CLAS Chem 1C Handout 9 Ch 17...

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