Question

E° (cal.) E° (exp.) 1. Fe(s)| Fe2+ (1 M) || Cu2+ (1 M) | Cu(s) 0.775 V 2. Pb(s) Pb2+ (1 M) || Cu2+ (1 M) Cu(s) 0.461 V 3. Sn(

0 0
Add a comment Improve this question Transcribed image text
Answer #1

Copper(II) forms co-ordination complex with ammonia ligand in aqueous medium. The reaction is shown below.

[Cu(H2O)6]SO4 + 4 NH3 (aq) \rightarrow [Cu(NH3)4(H2O)2]SO4 + 4 H2O(l)

The tetraamine-Cu(II) complex is dark blue in color. Therefore the cathode cell appears darker compared to 1M CuSO4 stock solution. Due to the above reaction effective Cu2+ ion concentration in the half cell decreases below 1M as a result, Eo decreases.

Add a comment
Know the answer?
Add Answer to:
E° (cal.) E° (exp.) 1. Fe(s)| Fe2+ (1 M) || Cu2+ (1 M) | Cu(s) 0.775...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT