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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


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