Discovering the Diffusion Coefficient: Rearranging the Randles-Sevcik Equation"

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SUMMARY

The discussion focuses on rearranging the Randles-Sevcik equation to isolate the diffusion coefficient (D). The equation is given as ip = (269000)n^3/2AD^1/2Cv^1/2. To solve for D, participants emphasize using basic algebraic manipulation to move all other variables to one side of the equation. This involves squaring both sides after isolating D^1/2, allowing for a straightforward calculation of the diffusion coefficient.

PREREQUISITES
  • Understanding of the Randles-Sevcik equation
  • Basic algebra skills for rearranging equations
  • Familiarity with electrochemical parameters such as peak current (ip) and stoichiometry (n)
  • Knowledge of concentration (C) and scan rate (v) in electrochemistry
NEXT STEPS
  • Practice algebraic manipulation of equations in electrochemistry
  • Explore the significance of the diffusion coefficient in electrochemical reactions
  • Learn about the application of the Randles-Sevcik equation in cyclic voltammetry
  • Investigate methods for measuring peak current in electrochemical experiments
USEFUL FOR

This discussion is beneficial for high school students, chemistry enthusiasts, and electrochemists seeking to understand the calculation of diffusion coefficients in electrochemical systems.

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How do i rearrange the randles-sevcik equation to find the diffusion coefficient?

ip=(269000)n^3/2AD^1/2Cv^1/2

Where ip= peak current
n=stoichiometry
A=electrode area
D= Diffusion coefficient
C=concentration
v=scan rate

I am trying to find the diffusion coefficient. I have the values was just wondering how to get D (the coefficient) on it's own..
 
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This is a simple, high school algebra. Move everything but D1/2 to one side of the equation, think what operation you can do (on both sides) to get D.
 

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