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Thread: Aluminium-CH3COOH BATTERY

  1. #1 Aluminium-CH3COOH BATTERY 
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    I have tried makin an aluminium-Ch3COOH battery.
    In the middle there is the graphite electrode( which I have taken from a special drawing pen) wrapped in a tissue that is soaked in vinegar and everything is wrapped in the aluminium which I have taken from a can. It s powerful enough to light a LED for two hours.
    I want to know what happens that makes the battery work. What are the chemical equations that take place? It would be very helpful if somebody explained to me how it works.


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    Bullshit Intolerant PhDemon's Avatar
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    Batteries work on the principle of redox (reduction/oxidation), without doing any research my gut feeling is the aluminium will be oxidized to aluminium(III) ions and the acetic acid will be reduced to ethanol.

    Oxidation half reaction: Al -> Al3+ + 3e-

    Reduction half reaction: CH3COOH + 4H+ + 4e- -> CH3CH2OH +H2O

    The overall chemical equation will be:

    4Al + 3CH3COOH + 12H+ -> 4Al3+ + 3 CH3CH2OH + 3 H2O

    The emf of the cell will be equal to the standard reduction potential of the reduction half cell minus the standard reduction potential of the oxidation half cell (you can look these numbers up). as the reaction proceeds the reactant concentrations will decrease leading to a drop in voltage as the battery discharges.


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    Thank you for your explication. But H+ is coming from the basic reaction of CH3COOH⇄CH3COO-+ H+?
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    Bullshit Intolerant PhDemon's Avatar
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    Yes, when ethanoic acid is present in solution some of it dissociates into H+ and CH3COO- ions.
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  6. #5  
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    thank you
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  7. #6  
    Bullshit Intolerant PhDemon's Avatar
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    No problem.
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  8. #7 What is Chemistry? 
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    Chemistry represents the section of the natural science that represents the physical properties, composition, structure and their cause and ways to synthesise into other forms of substance and their interrelationship with energy.Other branches like Physics,Biology etc are also concerned with the matter but Chemistry is the in-depth study of matter which also relates to the changes or reactions that matter undergoes ;how and why they form into different substances and the energy required to bring about the changes or reactions .So it simply implies that chemistry is a part of everything in our daily lives and also acknowledging the conceptions of chemistry might educate us with important explanations of how and why certain matters behave the way they do .


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    Last edited by Dywyddyr; July 11th, 2018 at 07:22 AM.
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  9. #8  
    Bullshit Intolerant PhDemon's Avatar
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    How does your post help after my definitive answer to the question? Oh yes, it spams for your site... Knock it off.
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