Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: malumunus on January 16, 2007, 06:29:22 PM
-
Hi
Is there any kind of redox indicator that would best indicate how well oxidation and reduction was delivered without the usage of a spectrophotometer?? If so, what kind?
-
It kind of depends on what the reaction is.
But look here:
http://en.wikipedia.org/wiki/Redox_indicator
See if any of those will do.
And as I said, it depends on the nature of reaction, look into:
http://en.wikipedia.org/wiki/Complexometric_indicator
And
http://en.wikipedia.org/wiki/PH_indicator
Those are by no means definitive list, just a easy starting point.
-
Oxidation and reduction are best controlled by a potento- or galvanostsat, where you can control the current and potential over a cell. The charge exchanged is a measure of the amount of reaction that has taken place, whereas the voltage usually gives you an idea on what reaction. (used in a 3-electrode cell, with a reference electrode)
But for simple indicators use the links enahs provided. Indicators work as a simple version of the reference electrode in the 3-electrode cell.