Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction: 2C12*(aq) + H2(g)2Cu*(aq) + 2H'(aq) Answer: kJ K for this reaction would be than one. Ret greater less Submit Answer 9 more group attempts remaining

Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction: 2C12(aq) + H2(g)2Cu(aq) + 2H'(aq) Answer: kJ K for this reaction would be than one. Ret greater less Submit Answer 9 more group attempts remaining

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 150CP

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Question

Part.a

Part.b

Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction:
2CU2*(aq) + H2(g)2Cu*(aq) + 2H'(aq)
Answer:
kJ
K for this reaction would be
than one.
Ret greater
less
Submit Answer
9 more group attempts remaining

Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction:
2Cu2"(aq) + Cu(s)2Cu*(aq) + Cu²*(aq)
Answer:
kJ
K for this reaction wopld be
than one.
Submit Answer
Retry Entire Group
9 more group attempts remaining

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The amount of manganese in steel is determined by changing it to permanganate ion. The steel is first dissolved in nitric acid, producing Mn2+ ions. These ions are then oxidized to the deeply colored MnO4 ions by periodate ion (IO4) in acid solution. a. Complete and balance an equation describing each of the above reactions. b. Calculate and G at 25C for each reaction.
An aqueous solution of an unknown salt of gold is electrolyzed by a current of 2.75 amps for 3.39 hours. The electroplating is carried out with an efficiency of 93.0%, resulting in a deposit of 21.221 g of gold. a How many faradays are required to deposit the gold? b What is the charge on the gold ions (based on your calculations)?
Consider the following galvanic cell: Label the reducing agent and the oxidizing agent, and describe the direction of the electron flow.
The equation G = nF also can be applied to half-reactions. Use standard reduction potentials to estimate Gf for Fe2+ (aq) and Fe3+ (aq). Gf for e= 0.)
Consider the reaction below at 25°C: 2MnO4(aq)+16H+(aq)+10Br(aq)2Mn2+(aq)+5Br2(l)+8H2O Use Table 17.1 to answer the following questions. Support your answers with calculations. (a) Is the reaction spontaneous at standard conditions? (b) Is the reaction spontaneous at a pH of 2.00 with all other ionic species at 0.100 M? (c) Is the reaction spontaneous at a pH of 5.00 with all other ionic species at 0.100 M? (d) At what pH is the reaction at equilibrium with all other ionic species at 0.100 M?
Consider the following cell reaction at 25C. 2Cr(s)+3Fe2+(aq)2Cr3+(aq)+3Fe(s) Calculate the standard cell potential of this cell from the standard electrode potentials, and from this obtain G for the cell reaction. Use data in Appendix C to calculate H; note that Cr(H2O)63+(aq) equals Cr3+(aq). Use these values of H and G to obtain S for the cell reaction.

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