You have a 5.00 cm diameter sphere that you would like to have plated with copper metal. How long will it take toelectroplate a 40.0 micron thick coating onto the sphere using Cu+2 and a current of 3.00 amps? The density of copper is8.94 g/cm³. 1 micron = 1.00×10-4 cm.[hint: Calculate the difference in volume of the coated and uncoated spheres and then use the density information todetermine your answer.]R

This answer is given below.Explanation:

Answered: You have a 5.00 cm diameter sphere that…

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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4 A certain metal M forms a soluble sulfate salt MSO4. Suppose the left half cell of a galvanic cell apparatus is filled with a 1.50 M solution of MSO and the right half cell with a 75.0 mM solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 40.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left right x10 X Ś
Standard Reduction Potentials Sn*(aq) + 2e → Sn²*(s) E° = 0.15 V K"(aq) + le → K(s) E° = -2.92 V |3D Faraday's constant is 96,485 C/mole e's An electric current of 1.00 ampere is passed through an aqueous solution of Ni(NO3)2. How long will it take to plate out exactly 1.00 mol of nickel metal, assuming 100 percent current efficiency? A. 386,000 s B. 193,000 s C. 96,500 s D. 48,200 s
A certain metal M forms a soluble nitrate salt MNO3. Suppose the left half cell of a galvanic cell apparatus is filled with a 175. mM solution of MNO3 and the right half cell with a 3.50 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 35.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left right ■ □x10 X S
A certain half-reaction has a standard reduction potential Ered=-0.64 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at least 1.20 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the cathode of the cell. ロ→ロ 7² 0 Is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? yes, there is a minimum. = v If so, check the "yes" box and calculate the minimum. Round your answer to 2 decimal places. If there is no lower limit, check the "no" box. no minimum X S ? Is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have? O yes, there is a maximum. ☐v If so, check the "yes" box and calculate the maximum. Round your answer to 2 decimal places. If there is no upper limit, check the "no" box. no maximum By using the information in…
A non-standard state galvanic cell is constructed at 25.00°C as described here. The Fe(s) anode is immersed in a 0.040 M Fe(NO3)2 solution. The Cu(s) cathode is immersed in a 0.0060 M Cu(NO3)2. The circuit is completed with a salt bridge containing 1.0 M KNO3. The standard Fe/Fe2+ reduction potential is –0.44 V. The standard Cu/Cu2+ reduction potential is +0.34 V. Calculate the non-standard-state cell potential for this galvanic cell and determine if the reaction described is spontaneous under these conditions.
. Consider the oxidation-reduction reaction Mg (s) + Cu2+ (aq) → Mg2+ (aq) + Cu (s) Sketch a galvanic cell that uses this reaction. Which metal ion is reduced? Which metal is oxidized? What half-reaction takes place at the anode in the cell? What half-reaction takes place at the cathode?
You have a 2.50 cm diameter sphere that you would like to have plated with platinum metal. How long will it take to electroplate a 40.0 micron thick coating onto the sphere using Pt+2 and a current of 0.500 amps? The density of platinum is 21.45 g/cm3. 1 micron = 1.00×10–4 cm.[hint: Calculate the difference in volume of the coated and uncoated spheres and then use the density information to determine your answer.]Time Required = Answer minutes
How many grams of X (MW = 91.45 g/mol)(in g) will be deposited on a cathode in 1.15 h by a current of 4.0 A? X6+ + 6e- → X(s) Report your answer with the correct number of significant figures.
Consider the following galvanic cells. Diagram I Au- cº 1.0 M Au³+ 3+ chemPad XX² (b) balanced cell equation II chemPad 8⁰ XX→→ 1.0 M Cu+ 1.0 M Cu²+ For each galvanic cell, give the balanced cell reaction and determine °. Standard reduction potentials are found in the Standard Reduction Potentials table. (Use the lowest possible whole number coefficients. Include states-of-matter under the given conditions in your answer.) (a) balanced cell equation I Help Greek Pt Help Greek Diagram II Cd- 1.0 M Cd2+ -Pt Ai 1.0 M VO₂, 1.0 MH+ 1.0 M VO²+
A chemist designs a galvanic cell that uses these two half-reactions: standard reduction potential Exed half-reaction 2 H2O(1)+2e → H2(g)+2OH (aq) Ε red -0.83 V 2+ Zn(aq)+2e →>> Zn(s) E = = -0.763 V 'red Answer the following questions about this cell.

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