Chapter 18, Problem 18.10P

Interpretation Introduction

Interpretation:

The concentration of platinum ions under given conditions should be determined.

Concept introduction:

• The electrochemical cell includes the flow of electrons and ions through a separate path between two materials and produces current.
• Electrode potential is the voltage produced between two materials.
• Electrode potential explains the tendency to corrode.
• Electrode potential can be calculated by the Nernst equation,

  $E_{cell}=E^0{}_{cell}-\frac{RT}{nF}\ln Q$

Where,

  $E_{cell}$ =cell potential at non-standard state.

  $E^0{}_{cell}$ = cell potential at standard state.

R = universal gas constant = 8.314 J/mol.K

T = temperature

F = Faraday's constant

n = number of moles of electrons

Q = reaction quotient