Talble li Voltai Calle Metale terted Metal at Metalat Eseli () Edel V) Anoho Cathode Cell 1.Zn°IZn Zn Cv 0.830V (0.1M (0.IM) 3. CdI Cu Ag 0.400V Cd Cu 0.520 V
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- Consider the corrosion Of overall reacthon: copper 9 30 ouco) + 0.5 Ozcg) + 2H,0" caq)-> Cu? cas) +3 Ho OO) It the parhal pressure Of onygen is 0.88 bar thle concentration of' cu2+Cuq) is 6.lM.W what PH does the neachon loecome 8pontaniebus ? IS 0.88 bar,3 theGiven: E0 -0.49V Fe (ag) t 2e teu) fe *" E -0.04V (aq) +3e tela) E +0 77 V Fe " (aqlte Fe "(aq). Cl2(g) + 2e 7 201 (aq). 34 E': +1-36 V Cal oulate the AE° for the reaction 2t Fe(s) t Claca) - te "(aq) t 2ci Caq).=15U,ENOINO=0.96V, pressure of. 08: 00 am %3D 08:30 . NO at equilibrium-ladm. While a balance equation and predict whether 1M HNO3 ill co oli ssolve gold metal to form a M Au salcetin - Calculate sE", DE, AG. predict if this reaction is Spondaneous or not s D9: 00 09:30 10: 00 10:30 34 11:00 1:30 2: 30 1:00
- For Redox Analysis of Iron... ~0.02 M of potassium dichromate is prepared as titrant for dried unknown. ~.3 g of sample, 50ml of 6M HCl, 20mL SnCl2, 10 mL of saturated HgCl2 solution, 60 mL of 3M H2SO4, 15mL of concentrated H3PO4, 100mL DI water. HCl (+ heat in fumehood until samples dissolves), SnCl2 (added with pipet until solution changes from yellow to colorless/light green with 3 drops in excess), HgCl2 (after cooling), H2SO4, H3PO4, DI Water, is added to the sample solution with 8 drops of diphenylamine sulfonate indicator then titrated with the potassium dichromate to a violet blue endpoint. 4. Why is it necessary to carry out the reduction of iron and then the titration, before going on to the next sample 5. If you look carefully, there are pieces of tin metal on the bottom of the SnCl2 reagent solution. Why is it there?For Redox Analysis of Iron... ~0.02 M of potassium dichromate is prepared as titrant for dried unknown. ~.3 g of sample, 50ml of 6M HCl, 20mL SnCl2, 10 mL of saturated HgCl2 solution, 60 mL of 3M H2SO4, 15mL of concentrated H3PO4, 100mL DI water. HCl (+ heat in fumehood until samples dissolves), SnCl2 (added with pipet until solution changes from yellow to colorless/light green with 3 drops in excess), HgCl2 (after cooling), H2SO4, H3PO4, DI Water, is added to the sample solution with 8 drops of diphenylamine sulfonate indicator then titrated with the potassium dichromate to a violet blue endpoint. 3. How would you prepare a complete anlaysis procedure using KMnO4 as the oxidant instead of K2CrO7? Include sample and solution preparation, approximate weights of samples and reagents, procedure and chemical reactions. In particular what is the purpose of the Zimmerman Reinhardt Reagent?For Redox Analysis of Iron... ~0.02 M of potassium dichromate is prepared as titrant for dried unknown. ~.3 g of sample, 50ml of 6M HCl, 20mL SnCl2, 10 mL of saturated HgCl2 solution, 60 mL of 3M H2SO4, 15mL of concentrated H3PO4, 100mL DI water. HCl (+ heat in fumehood until samples dissolves), SnCl2 (added with pipet until solution changes from yellow to colorless/light green with 3 drops in excess), HgCl2 (after cooling), H2SO4, H3PO4, DI Water, is added to the sample solution with 8 drops of diphenylamine sulfonate indicator then titrated with the potassium dichromate to a violet blue endpoint. 1. What is the purpose of the phosphoric acid in this experiment? Please be specific. 2. How does the Diphenylamine sulfonate indicator work? What chemical reaction causes the color change? How is an indicator chosen in a redox reaction?
- www-awn.aleks.comalekscg/X/Isl.exe/1o u-lgNslkr7j8P3)H-1JITX1655270TVADBLZzfZ TTdxWze18DtUcINd Ip4Sv4w3Z O ELECTROCHEMISTRY Ranking the strength of oxidizing and reducing agents using.. Use the information in the ALEKS Data tab to sort the following chemical species by reducing power. species reducing power Al (s) choose one v Ni(s) choose one v Zn (s) choose one v Ca(s) choose onev X. IICalculate the theoratical potential of the fallowing cells (In each case assume approximately qual to and that femperature is that activities are mo le concentration asc) 34 a). SCE IL Fe (0.0150M) fe(0.0250m/Pt b) SCEI Zn(0.00135M)|Zn c) Saturateal AglAq a reference lIT loo45 OM).Ti (0.0250M)1PE dl Saturateed Ag/Agce referencell 13 (o 00667M).TL (0.00433M)1PtCalculate the Con centration of aspecific Solution the molay a bsorption having Coe fficient 4x10?C Licm. mol) Penetrati on The percentage of is 50% If you know the 1cm width of the Cell e 0.19 1.93 e O.0 75 © o.75
- |Bubblinig Solatron Yhunel Dark soliol de pornted. Data Table Observations Electrolyte (Salt Solution) Anode Cathode Yelloy subrtynce Jamed Solidformed on eleprode Sola hon termel flack oden shad isadled. pink Bubbfing. Solutio, humed Potassium Iodide Rpblig with oglor Chlonne!. Tum fue then Bubbling. Solutran Hemed Sodium Chloride KI and starch adoled. pink. Bubbling- Solatron Yeuanol Dayk soliol de posnted. yellow! Stong odor. Coloris neddish- browwn. Copper(II) BromideWhat do you mean by Faaday eurin Give enample. How my grams off Mg2 (At WE 24. 305 am.u) me deposited on of cell if an elechic cussink the cathode are an elctiolytic of 5.00 A 4s Aun threugh a of Cu SO4 for a peiiod of a 30 minuler. solutionwww-awn.aleks.com scgi/x/Ist.cxe/1o u-lgNslkr7j8P3H-1JITX1655270TVADBLZzfZ TTDXW2 e5N8WY11OPcLAKYDH7EWSASLm O ELECTROCHEMISTRY Recognizing consistency among equilibrium constant, free.. ON A student made measurements on some electrochemical cells and calculated three quantities: • The standard reaction free energy AG". • The equilibrium constant K at 25.0 °C. • The cell potential under standard conditions E". His results are listed below. Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity in each row, if any. Note: If there is a mistake in a row, only one of the three quantities listed is wrong. Also, you may assume the number of significant digits in each quantity is correct. Also note: for each cell, the number n of electrons transferred pei redox reaction is 2. calculated quantities (Check the box next to any that are wrong.) cell AG" K E" A. 226. kJ/mol 39 3.92 x 10 -1.17 V В 224. kJ/mol 1.75 x 10…
