{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

C112H F09 T4 - woman bfldn of momma{a 7‘ 1 Balance the...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: woman bfldn of momma {a 7‘ 1. Balance the following two reactions in m solution. [ Note that blank spaces are left for 11+ and H20 on both the reactant side and the product side of the eqn. When you have balanced the equation, fill in all needed blank spaces but fill in only one H+ and only one H20 (either on reactant or product side as needed).] 2. For eqn. 1A, what is the oxidation number of I in 104' and what chemical species is the reducing agent in reaction 1A. _ _ i‘l J", 23. Ox1d. Num. 1 m 104' KM / ”a? +7 3. There is a special name for the type of redox reaction shown in problem 1B. What special type of redox process is rxn 13.: 2b. Reducing agent in IA. [A] won" —a W"[email protected] -: "—v x' i 1 I'——>I ' ~ mu Wflu Hum x5? Wan W M w) lb) WWW” *1th Mryénkyrfllu'.) magma [350+ka $1,22qu W/ EH*+ Rump")? a W: t 310”” * urlzo .- ?U —9 VH9 40” 3 fl Wfiunl We 1% 4'3“”? +HzU www—WW sfio+fiapmwzg~ 3110+ W0 4 PHg" You-+14" 62le 1:3}: 4. A soln of Au“+ is used to plate out Au in an electrochemical cell. If a total of 0.75 g of Au is plated out in a total time of 1200 seconds, what was the electrical current used? The atomic mass of gold is 197 g/mole. 4. Include sign and 5. A certain electrochemical reaction is to be used to make an electrochemical cell..lt is a seven electron change process and has an equilibrium constant of KmL1 = 125,000 at 298 K. For this process calculate A G” and E° for this reaction. L” BTanil 81 use {WWW « — 261021 ill .t 5. Include Sign and nits. 6. The reaction below is balanced in acid solution, in the box below write the eqn. for this same reaction when it is balanced in basic solution: 5Fe + 2MnO4' +16H+ —> 51=e+2 + 2Mn+2 + 8H20 +ll10H' +Ib0H‘ Sleflllnllp mo s Ste” + ZNn” ell/10+ MM“ 6. Complete balanced eqn. for reaction above in basic solution: SFe+ 7W q'+ leO a SP“ levfzwhlbflll' 061°: all? _ : (-19)th em l mom 7. An electrochemical cell 13 constructed based on the following two half reactions: 3% 1 2;“ Jr 3A9 ‘5fikg—4—e'—>—Agl—— £° = o 800 Volts WW F6 are“ ,5? t”: — 11 Volt! 3 In the space below write a balanced equation describing the chemical reaction that occurs in this cell an fitattlfmt 1+.l0U (-Jtul : ,lfll Wl : .GBV . What material would the electrode used for the anode be made out of: 8. An electrochemical cell is constructed based on the following reaction: . 6c" 2A1+3ZnH —> 2A1H++3Zn £°=0.902Volts The measured potential of this cell is found to be E. = 1.002 Volts when [ZnH] = 2.5 M. Calculate [Aim]. Show all work for credit. Mt oat lugl loll n 2 U5 twig] ’lfiZttllll "l t ’ (th e l: tall—lat = £0.39; hlag a 9 mm prltlflttl a Mlle fi mug fmflflfiueéléfifl i, 9. .A standard electrochemical is constructed based on the redox equation and has a potential of 1.25 Volts. 5F: + 2Mn04' +16H+ —+ 5Fe+2 + 2Mn+2 + 8H20 Described below are changes that are made to this standard cell. Circle one answer only as to whether the changes will result in higher, lower, or no change to the cell potential compared to the standard cell. a [It/[n04] is doubled lower no change u-p-L‘lrt/ / Min—mi b. [MnH] is doubled w“! I higher no change \/ c. The pH is changed to 7.5 higher no change I d. The amount of Fe is doubled higher lower 10. The fimdamental units in the metric system are kg, m, sec, coulomb. Circle the name of the unit that con‘esponds to the named unit: (circle one answer only) kg m 1’ see2 fig any/p joule.) newto kg m2! sec3 {3:91; ‘5 '33" a/Ap joule nydln kg m2f00ulomb sec2 [ICES—f 3% a p joule 117/0 @ wt coulomb f sec % joule neyt‘von ohm \‘Plt w tt 11. In the space below write a balanced chemical equation for the half cell reduction potential that is defined as have a potential of exactly zero. 12. What is the name of an electrochemical cell in which an external energy source is used to force the electrical current to flow in the opposite direction of a spontaneous cell: 12. Circle one answer only ampéic couloéfic galvanic prye/ie voltaie END OF REGULAR EXAM Bonus Question (3 points only) do not answer until you have finished the regular exam and checked your answers. Voltage or electrical potential, like gravitational potential is an intensive (or intrinsic) property. In the space belowjist up to three other properties that share this property of being intensive (or intrinsic). You will be given one point for each correct answer--but you may list a maximum of only three answers. ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern