Chapter 25: Q.25.7 (page 686)
What is the purpose of the electrodeposition step in stripping analysis?
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Why are stripping methods more sensitive than other voltammetric procedures?
Why are stripping methods more sensitive than other voltammetric procedures?
A solution containing was analyzed voltammetrically using the standard addition method. Twenty-five milliliters of the deaerated solution, which was in , produced a net limiting current of } at a rotating mercury film working electrode at a potential of (versus ). Following addition of of a standard solution, the resulting solution produced a current of }. Calculate the concentration of the sample.
Why is a high supporting electrolyte concentration used in most electroanalytical procedures?
In experiment 1, a cyclic voltammogram at an HMDE was obtained from a solution of data-custom-editor="chemistry" at a scan rate of . In experiment 2, a second CV is to be obtained from a solution of data-custom-editor="chemistry" using the same HMDE. What must the scan rate be in experiment 2 to record the same peak current in both experiments if the diffusion coefficients of data-custom-editor="chemistry" are , respectively. Assume that the reductions of both cations are reversible at the HMDE.
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