electrolytic solutions

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Martin_Sarafyan_2K
Posts: 11
Joined: Wed Sep 21, 2016 2:56 pm

electrolytic solutions

Postby Martin_Sarafyan_2K » Sat Feb 04, 2017 3:09 pm

Why does the conductance of a E solution increase with temperature, but metals decrease? Also, do we have to know anything about metallic conduction vs electrolytic conduction?

Timothy_Yu_Dis3A
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Re: electrolytic solutions

Postby Timothy_Yu_Dis3A » Sat Feb 04, 2017 5:55 pm

Hey!
The conductivity of an electrolytic solution increases because a temperature increase would cause the ions inside the solution to have a higher kinetic energy and be more active. I'm not quite sure why the conductivity for a metal would decrease when the temperature is increased but when you decrease the temperature of metals they can reach a point where the resistivity becomes 0 and they become superconductors which has to do with electrons but not quite sure how it works. Not quite sure if we have to know anything about this either.

Chem_Mod
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Re: electrolytic solutions

Postby Chem_Mod » Sat Feb 04, 2017 8:13 pm

Timothy is correct: the conductivity of an electrolyte solution increases with temperature as the increased temperature allows for better solubility and dissolution of the electrolyte in solution. The conductivity for metals decreases as temperature increases because the thermal vibrations of the lattice atoms interferes with the electron pathway required for conductivity.

As for superconductors, they're generally not made out of pure metals - usually poor metals & metal oxides make the best superconductors as we currently understand them. I don't believe you'd have to know anything about them for this course however.


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