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Electrolyte Challenge: How do electrolytes carry current?
Posted: Wed Jun 04, 2014 3:54 pm
by hannahbear1030
I'm doing the Electrolyte Challenge from Science Buddies.
I'm confused on how the electrolytes (technically the ions) carry current from one copper wire to the other in a beverage.
How does it work?
Re: Electrolyte Challenge: How do electrolytes carry current
Posted: Thu Jun 05, 2014 9:47 pm
by rmarz
hannahbear1030 - The electrical conductivity of material is dependent on the availability of 'free electrons' to move when subjected to an electromotive force (think voltage). Most metals are excellent conductors, and have many of these free electrons waiting to move electrons and hence carry a 'current' or flow of electrons. Insulators, like glass, plastic have very few 'free electrons' and will not conduct measurable current. The range of conductive capability is substantial. Same is true with the liquids you are using in the electrolyte experiment. Pure water has few free electrons to conduct, but by adding another material like a salt or acid or hydroxide material, free electrons are provided. Here is a link that might help you understand better.
http://www.scienceclarified.com/Di-El/E ... ivity.html
Rick Marz