Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: gaschroking on January 15, 2007, 07:36:44 AM
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Hello eveyone,
I tried to search the net about this two terms;
1. Electronic conductivity
2. Electrode potential versus standard hydrogen electrode
But i cant still understand what they really mean. Anubody here who can help me explain in a layman' s language the above terms. When we say we measure the electronic conductivity of water and its electrode potential waht does it indicates about the water? Example what would be ?the effect of higher electronic conductivity or wlelctrode potential to the water organisms?
Many thanks
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Electric reduction potential, will naturally be different for each solution. For the use of easy reference, we assign he reaction of the standard hydrogen electrode to be 0.
This is just a convention, an arbitrary potential to give us a point of reference.
Just like with water, which freezes at 0oC. Hexane boils at 69oC and Benzene boils at 80oC. That gives them a difference of 11oC. If we said water freezes at 200oC, the difference would still be 11oC but they would boil at 269 and 280 respectively.
We we measure the half-cell potentials relative to the S.H.E. we are putting the potentials on a scale between which we can measure the difference.
http://en.wikipedia.org/wiki/Standard_electrode_potential
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May I know what factors influence the increase or decrease of the elctronic conductivity and electrode potential of a subtance(e.g, water)? Thanks
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Google water conductivity, check wikipedia for Nernst equation.
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electrical conductivity is also measured as total dissolved solids (TDS). depending on the kind of substances inside, it may be conducive or negative to your organisms' environment.
however, a higher electrical conductivity is a rough sign of a greater amount of nutrients, if u know what u have put inside before, which is essential for aqua plants