CW 22 - O‘bservafiOns: A‘0.2'g unknown sampie...

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Unformatted text preview: O‘bservafiOns: A‘0.2'g unknown sampie dissolved gomfiletgly in 15 mL of DI.wa‘ter. To 5 mL , a of unknown solution is added 1 ml. of 6 M NH3 plus a few drops .ofNaOI-I tojgriyg file pH to _1_i. This resulted in the fonnation of a Erecipitate. The precipitate was solublein l M NaOHT —.—'_—‘——_n—'—‘—~— Ion . PAU JUSTIFICATION 0R TEST. ' ' I Oe- 1.7 Qk(0H>$IPM9LF;*¢/flgl 54—1— 33%;]?! Ari-37:- ?— Aims! (£33.; give—g Ln - hiLOH" ' _ . - fie/J 314,4. 35 Wienfl 94% MHng Ca” M wA/L Na.ng ,gggfiJennvgau—ULAL Pyt— et 'PV—JJ' .' - - “Th. FMQFL’TWJ'L: woyM M 13+ efifiv . , sonata. ea Noemi. #944,; yea—~— PMv . Mg+2 EL ' ' ' - fruit" +54 can‘an S-aih MM. 051M Fig/Va?) . ' “>LJL;u-Flzi“ ' Cl“ (LIL . ' - _ . . ‘11,}. 30L. Lug-H” 0*{H13¢_6I.03')&I 804-2 1/}. ‘ :Fft-Iiff Fwdefl A meta, saw, an”; ‘ .t ' ;' ‘rvafioh-s: A 0.3 g salnpie of the unknown was mixed with'20 mL of DI watef. A white ' Md after prolonged shaking and gentle heating. The supemate had a pH of 3. Ion ' PAU' . JUSTIFICATION OR TEST Ara E- t/o-W pix‘OQEL;/[ 3 I TIIL/LuSOiLA—DJ-J-Lau , Ca+2 [<3 SD . ' DSWJILJL~L ~9JL@H_)3 W wig-Jul W Dita-PH ft. “Wt—P? 7M‘W—_° , ‘ _ .- 1;, - Ow; ngww[a+ffl3>’ 0% .3 IS: soil-2 1 . ‘JI’IALI 5W_ tax—3 0 mini L4; 134.4“; Q Q5)» CO3_2 Q) I a}: ‘W ‘Vir/ ' Worksheet 22 1. Introduction to Electrochemistry — Some Emma: Electrochemical Cell: pr SW12; V’LE/u— ‘a; Austen FwJ/WM 03.. W ehmwi 94232.31; 7' Voltaic cell=Battery: _ pr :3an wth' 0.. ovdr’w [M A . W" W wefi'gUJ W, Electrolysis (electrolytic) cell: ‘- Z ‘w/LM “3L: VLPJ‘ 9% buzzed “*“76’ W ‘L We Wail“ - Anode: Where occurs. Also, what W3 move towards_ E} EkjlaotL g4)». wol'i'rZ/Lc Cal/L @ emulate 3% Jae.an QM? /' 7- , V! Cathode = where M occurs. Also what M move towards. C9 etc—em jrohdouacg mu.) e/Cz—LECOL «lax—A ($ij 2. How (and how not) to build a working Voltaic Cell. - Method #1 — Combine the reactants, Observe electron transfer. wow ,- b-vct. m (4&5 _ - E’Wj i s Mew Cu+2 7+ Zn(s) w+ Cu(s) + Zn+2 Oil {a pr - \ 0 Method #2 — Separate into 2 half cells. fwefifl « (1/. Ape/3U” w (LR/L- widow 1"? o Method#3 SM») WMVM we}? Q)st ' E; HOV Zn 1: GD CA in ® ...
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This note was uploaded on 03/27/2012 for the course CHM 2046 taught by Professor Veige/martin during the Spring '07 term at University of Florida.

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CW 22 - O‘bservafiOns: A‘0.2'g unknown sampie...

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