What is the pH of the solution in the cathode compartment of the following cell
ID: 795642 • Letter: W
Question
What is the pH of the solution in the cathode compartment of the following cell if the measured cell potential at 25 C is 0.60 V?
I have no idea where to even start with this problem. Please list step by step with correct answers so I can try to understand.
THANK YOU!!
What is the pH of the solution in the cathode compartment of the following cell if the measured cell potential at 25 C is 0.60 V? I have no idea where to even start with this problem. Please list step by step with correct answers so I can try to understand.Explanation / Answer
oxidation: Zn(s) ---> Zn2+ & 2 e- Eo = + 0.763 volts
reduction: 2 H+(1M) @ 2 e- ---> H2(1atm) Eo = 0 volts
the standard Eo for your reaction would have been + o.763 volts
the measured cell potential got cut off
email me with it
or try using this
nernst equation:
E = Eo - (0.0592 / n )(log Q)
E = +0.763 - (0.0592 / 2 moles of e-) (log [prod] / [reactants]
E = +0.763 - (0.0296) (log [Zn+2] [H2] / [H+]^2 )
E = +0.763 - (0.0296) (log [1M] [1 atm] / [H+]^2 )
E =.5
.5= +0.763 - (0.0296) (log [1M] [1 atm] / [H+]^2 )
0.5 - 0.763 = - (0.0296) (log [1 ] / [H+]^2 )
- 0.263= - (0.0296) (log [1 ] / [H+]^2 )
- 0.263 / - (0.0296) = (log [1 ] / [H+]^2 )
0.8.885= log ([1 ] / [H+]^2 )
do a 10^x on both sides:
767361489.4 = ([1 ] / [H+]^2 )
[H+]^2 = 1.303*10^-9
[H+]^2=3.6055*10^-5
pH = 4.443
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.