× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
s
5
g
5
K
5
o
5
g
5
o
4
k
4
s
4
I
4
k
4
j
4
o
4
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
Annonn Annonn
wrote...
Posts: 213
Rep: 1 0
2 years ago
You construct a voltaic cell for the following chemical reaction:
Fe2+(aq) + Mg(s) → Fe(s) + Mg2+(aq)
The measured cell potential under standard conditions is +1.92 V. Given that E°red for Fe2+(aq) ⎟ Fe(s) is -0.45 V, what is E°red for Mg2+(aq) ⎟ Mg(s)?

+2.37 V

-2.37 V

+1.47 V

-1.47 V

4.74 V
Read 84 times
1 Reply
Replies
wrote...
#1
Educator
2 years ago
I believe what you do here is add the two numbers:

+1.92 V + (-0.45 V) = 1.47 V

We know left hand side electrode where oxidation occur acts as an anode, and the right hand side electrode where reduction takes place acts as an cathode.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  960 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Gallery
  
 298
  
 109
  
 2943
Your Opinion
Which country would you like to visit for its food?
Votes: 214
Previous poll results: What percentage of nature vs. nurture dictates human intelligence?