lifeisogood Posted June 17, 2005 Share Posted June 17, 2005 ) The standard reduction potential for Zn+2 is -0.76 V. Calculate the voltage of the following cell at 25°C. Zn|Zn2+ (1.0M) || H+(0.001 M), H2 (g,1.0 atm)|Pt Link to comment Share on other sites More sharing options...
gnpatterson Posted June 17, 2005 Share Posted June 17, 2005 I did this stuff decades ago and thought I'd never forget it, but I have. You are looking at tricky question. It looks almost like the definition of the standard potential in which case the answer would be 0.76V HOWEVER looking closely I see that the concentration of H+ is 0.001 M so I must use the Nernst equation. I have got to get the equation balanced and everything That is way TOO difficult for my old old brain, fortunately google gives the answer on http://www.science.uwaterloo.ca/~cchieh/cact/c123/nernsteq.html this exact example is used and the equation is 3/4 ways down the page, just slot the numbers in and you have it. Link to comment Share on other sites More sharing options...
DQW Posted June 20, 2005 Share Posted June 20, 2005 What is the point in giving away solutions for free ? lifeisogood : Do you understand what a Std Reduction Potential applies to, and what is the difference between [imath]\Delta E^0 [/imath] and [imath]\Delta E[/imath] ? The Nernst Equation tells you how to get one from the other. Link to comment Share on other sites More sharing options...
gnpatterson Posted June 21, 2005 Share Posted June 21, 2005 how do i charge? use paypal?? Link to comment Share on other sites More sharing options...
Phi for All Posted June 21, 2005 Share Posted June 21, 2005 how do i charge? use paypal??Make him work it off by actually doing some of his own homework. We typically try not to provide the actual answers in Homework Help, just a few bumps in the right direction. It aids in the learning process, we find. You know, give a man a fish, feed him for a day, but teach a man to fish.... Link to comment Share on other sites More sharing options...
DQW Posted June 21, 2005 Share Posted June 21, 2005 Yes, I didn't imply that you should charge him for it. Link to comment Share on other sites More sharing options...
gnpatterson Posted June 23, 2005 Share Posted June 23, 2005 sorry I am effectively (with decades of neglect) approaching this subject from the point of view of a novice. and for other reasons i find it difficult to understand the rules of forum etiquette ( well the rules of etiquette period. ) Link to comment Share on other sites More sharing options...
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