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Author Question: Gold is produced electrochemically from an aqueous solution of Au(CN)2 containing an excess of CN. ... (Read 27 times)

geodog55

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on: Mar 21, 2021

Question 1

Gold (atomic mass = 197.0) is plated from a solution of chloroauric acid, HAuCl4; it deposits on the cathode. Calculate the time it takes to deposit 0.56 gram of gold, passing a current of 0.10 amperes. (1 faraday = 96,485 coulombs)

◦ 23 hours
◦ 2.3 hours
◦ 46 minutes
◦ 15 minutes
◦ None of these are correct.

Question 2

Gold is produced electrochemically from an aqueous solution of Au(CN)2– containing an excess of CN–. Gold metal and oxygen gas are produced at the electrodes. How many moles of O2 will be produced during the production of 1.00 mole of gold?

◦ 0.25
◦ 0.50
◦ 1.00
◦ 3.56
◦ 4.00
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Marked as best answer by geodog55 on Mar 21, 2021

Animal_Goddess

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Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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geodog55

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Reply 2 on: Mar 21, 2021
Gracias!

Dominic

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Reply 3 on: Yesterday
Wow, this really help

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