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

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Homework Help Overview

The problem involves calculating the current in an electrolytic cell based on the mass of gold deposited over a specific time period. The subject area includes electrochemistry and stoichiometry.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the conversion of mass to moles using the molar mass of gold and question how to apply this to find the current. There is also a focus on the relationship between charge and current.

Discussion Status

Some participants have provided guidance on finding the molar mass and converting mass to moles. There is an ongoing exploration of how to relate these calculations to the current in the cell. Multiple interpretations of the problem are being considered.

Contextual Notes

Participants are working under the assumption that the mass of gold is accurate and are discussing the implications of using the atomic mass for calculations. There is a mention of the need to convert kilograms to grams for the calculations.

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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