Answered: ~~~~ 2) Determine the minimum voltage…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

1) Identify the reaction that occurs at the anode and the cathode.

anode: _________
A) Cr ---> Cr³⁺ + 3 e^-
B) Cr³⁺ + 3 e^- ---> Cr

C) 2 Br^- ---> Br₂ + 2 e^-

D) Cr³⁺ ---> Cr + 3 e^-

E) 2 Br^- + 2 e^- ---> Br₂

F) Br₂ +2 e^- ---> 2 Br^-

----------

cathode: _________

A) Cr ---> Cr³⁺ + 3 e^-
B) Cr³⁺ + 3 e^- ---> Cr

C) 2 Br^- ---> Br₂ + 2 e^-

D) Cr³⁺ ---> Cr + 3 e^-

E) 2 Br^- + 2 e^- ---> Br₂

F) Br₂ +2 e^- ---> 2 Br^-
~~~~~~~~
2) Determine the minimum voltage that must be applied to a cell containing molten CrBr₃ in order for electrolysis to occur.

_______ V

~~~~
3) If 6.26 A is applied for 69 minutes, what mass of Cr(s) will be produced?

_________ g Cr

~~~~
4) If 13.7 A of current is applied, how long would it take to produce 48 g of Cr(s)?

_______ hr

Voltage
source
Porous screen
Anode
Cathode
Molten CrBr3

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