Answered: A thin film of zinc is to be deposited…

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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_{A thin film of zinc is to be deposited on one side of a steel sheet. Determine the zinc film thickness per 1cm² of steel sheet if 2 A current was used and the electrolytic deposition process was done for exactly 30 minutes at 25^oC. The zinc solution has a concentration of 1 M and can be assumed to be constant throughout the process.}

_{pls explain the solution shown in the figure thoroughly or you can come up with your own thank you}

Description
The total charge passed through the solution was Q = It
Q = It
Q = 2 A x 30 x 60
Q = 3600 C
Zn+2 + 2e- → Zn (s)
I mole of Zn requires 2F charge to form 65.38 g
%3D
2F → 65. 38 g
3600 C will give = 65.38X1600
= 1.22 g
Hence, 1.21 g of Zn will be deposited.
2x96500
Step 2
Determination of the zinc film thickness per 1 cm? of steel sheet
1.2lg
Thickness per cm? of the sheet =
I cm?
= 1.21 g/ cm?

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