I have some chemistry questions. please give me al correct answers. a) Calculate
ID: 874227 • Letter: I
Question
I have some chemistry questions. please give me al correct answers.
a) Calculate the standard cell potential for the following cell
Cu (s) | Cu2+ (aq) (1M) || Co2+ (aq) (1M) | Co (s)
answer = V
b) The following cell was constructed and found to produce a voltage of 1.08 V.
Co (s) | Co2+ (aq) (1M) || Ag+ (aq) (1M) | Ag (s)
Calculate the standard reduction potential for Ag+ (aq) | Ag (s)
answer = V
c) Which of these species is the best oxidising agent?
Fe2+(aq)
Standard Reduction Potentials
Cu2+ | Cu +0.34V
Ni2+ | Ni 0.24V
Co2+ | Co 0.28V
Fe2+ | Fe 0.44V
Zn2+ | Zn 0.76V
Mg2+ | Mg 2.36V
Mg2+(aq) Zn2+(aq) Co2+(aq)Fe2+(aq)
Standard Reduction Potentials
Cu2+ | Cu +0.34V
Ni2+ | Ni 0.24V
Co2+ | Co 0.28V
Fe2+ | Fe 0.44V
Zn2+ | Zn 0.76V
Mg2+ | Mg 2.36V
Explanation / Answer
I have some chemistry questions. please give me al correct answers.
a) Calculate the standard cell potential for the following cell
Cu (s) | Cu2+ (aq) (1M) || Co2+ (aq) (1M) | Co (s)
Solution:
Lets write overall reaction from above cell.
Cu2+ + Co (s) -->Cu(S) + Co2+
[Co2+]= 1M
To calculate standard cell potential we need to use Nernst equation :
Ecell = E0cell