Answered: [K;Fe(CN)s] (mM) limiting current (µA)…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 18.86QE: How long would it take to electroplate a metal surface with 0.500 g nickel metal from a solution of...

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The purity of a sample of K₃Fe(CN)₆is determined using hydrodynamic voltammetry at a glassy carbon electrode. The following data were obtained for a set of calibration standards.

A sample of impure K₃Fe(CN)₆ is prepared for analysis by diluting a 0.264 g portion to volume in a 100 mL volumetric flask. The limiting current for the sample is 444 μA.

a) What type of calibration method is used?

b) What is the purity of this sample of K₃Fe(CN)₆ (FW=329.25 g/mol)?

[K3Fe(CN)6] (mM)
limiting current (µA)
2.0
127
4.0
252
6.0
376
8.0
500
10.0
624

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