[Chemistry] Calculation of Pt potential

[jkh4]

Homework Statement

Calculate the potential of a Pt electrode immersed in a solution that is 0.0263M in K2PtCl4 and 0.1492M in KCl.
The answer given in 0.78

Homework Equations

E = Eo - 0.05912/2 * log Q (Nernst Equation)

The Attempt at a Solution

We try looking at the reduction of PtCl4 with oxidation of Cl2, and came out with an answer, but its different from the answer key given.

Maybe there is something with the oxidation/reduction of K?Thanks.

 

[Borek]

And not Pt+2/Pt? This is solution of complexed Pt+2, it must contain some free Pt+2. Not much, but that's where I would start.

 

[Blueshift5]

I would like to suggest double-checking the calculations and units used in the attempt at the solution. It is important to ensure that all values are in the correct units and that the Nernst equation is applied correctly. Additionally, it may be helpful to consider the standard reduction potential of Pt and K ions in the solution, as well as the activities of the species involved. It is also possible that the given answer may have been rounded or approximated, so it is important to consider the level of precision needed for the calculation. I would also recommend checking for any errors in the given answer key or seeking clarification from the instructor.