Understanding Chemical Cells: Questions & Answers

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Understanding electrochemical cells involves several key concepts. A copper wire connected solely to a multimeter will not generate voltage without a chemical reaction occurring. When using a zinc and copper electrode setup, the voltage can be influenced by the concentration of the electrolyte; a more concentrated solution or different salts like potassium nitrate may enhance voltage output. Zinc atoms can release electrons more readily in solution, even in pure water, due to their tendency to form ions. If a zinc electrode is used instead of a copper electrode, it can still produce voltage, depending on the overall cell configuration and the presence of an electrolyte. For further information on chemical cells, various online resources can provide valuable insights.
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I am trying to understand the chemistry cell thoroughly.
1.If there is only a copper wire connected to a multimeter, there should be no voltage, isn't it?
2. For the set up of a zinc electrode and a copper electrode, will I get a larger voltage by changing the electrode? Such as a more concentrated one, or potassium nitrate instead of magnesium(II) nitrate.
3.Concerning the set-up in no.3, why electrons can be given up by zinc atoms?
My idea: Zinc atom forms ions more readily in solution ( can it be pure water?) than contacted with copper wire.
4. Will there be any voltage if I use the zinc electrode instead copper electrode?
So far, I am learning chemical cells, please tell me some information. Thank you.
 
Chemistry news on Phys.org
Google: electrochemical cells

You will find many good links.
 
Give some helps please. Busy doing a project.
 
http://physchem.co.za/Redox/Cu-Zn.htm
 
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