How many moles of gold are deposited on the electrode in 10.98 hours?

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SUMMARY

The discussion focuses on calculating the current in an electrolytic cell where 3.32 kg of gold is deposited over 10.98 hours. To find the current, participants emphasize the need to convert the mass of gold into moles using its molar mass of approximately 197 g/mol. The process involves calculating the number of moles from the mass, then determining the total charge using Avogadro's number, and finally applying the formula for current, which is charge divided by time.

PREREQUISITES
  • Understanding of molar mass and its calculation
  • Familiarity with Avogadro's number (6.022 x 1023 entities/mol)
  • Basic knowledge of electrochemistry, specifically electrolytic cells
  • Ability to apply the formula for current (I = Q/t)
NEXT STEPS
  • Calculate moles of gold from mass using the formula: moles = mass (g) / molar mass (g/mol)
  • Learn how to apply Avogadro's number to convert moles to number of atoms
  • Study the principles of electrolysis and the role of current in electrolytic cells
  • Explore advanced electrochemical calculations, including Faraday's laws of electrolysis
USEFUL FOR

Chemistry students, electrochemists, and anyone involved in practical applications of electrolysis and current calculations in electrolytic processes.

bob12345
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Homework Statement



If 3.32 kg of gold is deposited on the negative electrode of an electrolytic cell in a period of 10.98 h, what is the current in the cell in this period?Assume that each gold ion car ries one elementary unit of positive charge.

Homework Equations



i don't know what equation to use all i know is current= charge/time



The Attempt at a Solution


i couldn't find the solution because i didnt know how to use the mass??
 
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Are you sure that it was 3.32 kg ? A big piece of gold.

Anyway: Find the molar mass of gold (about 197 g/mol) . Get the moles of gold from the given mass. Multiply by Avogadro number: you get the number of gold atoms. Each carries an elementary charge -how much is it? You know the charge and time, easy to get the current.

ehild
 
Last edited:
yes it was 3.32 and now ill try working it out how you said
 
the atomic mass is 196.97 bt how do you get it to moles?
 
This value means that the mass of one mole gold is 196.97 g.
If 196.97 g is one mole, how many moles are in 3.32 kg?

ehild
 

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