Chemical portal


Math Forum

Contact webmaster

online education
free homework help
chemistry problems
questions and answers

© 2017 WebQC.Org
All rights reserved

By using this website, you
signify your acceptance of
Terms and Conditions
and Privacy Policy.

  Sign up now to (1) ask a chemistry question, (2) share your expertise, (3) engage in conversation with other chemists.
Post new topic Reply to topic
   Chemical Community Forum Index : Chemistry forum
View previous topic :: View next topic  
Author Message

Joined: 21 Aug 2017
Posts: 2
PostPosted: Mon Aug 21, 2017 5:40 pm    Post subject: voltaic cell gives unexpected voltage Reply with quoteFind all posts by jesada

A voltaic cell made with Cu l CuSO4 ll Fe l Fe(NO3)3 yielded a -0.420V when connected with black to Fe and red to Cu. The Cu has the lower Standard Reduction Potential(0.34V) so it should be oxidized( anode = black lead to meter) and the Fe(0.77V) should be reduced(cathode = red lead to meter) but this gives a negative voltage which means the flow of electrons( DC current is going in the opposite direction. (Both solutions were 1.0M)
This was done in "micro scale" with a black yarn string soaked in KCl as the salt bridge.
Seems weird. Any help out there?
Back to top
View user's profileSend private message
Display posts from previous:   
Post new topic Reply to topic
   Chemical Community Forum Index : Chemistry forum Page 1 of 1

Jump to:  

Page Chemical Forum from the Chemical Portal
WebQC.Org online education - help with your degree online