The oxidation of o-dianisidine (o-DIA) is electrochemically reversible and involves the transfer of two electrons. Linear sweep voltammetry was performed on a 2 M H₂SO4 solution containing 2.81 mM of o-DIA using a carbon paste electrode with an area of 3.52 mm². At a scan rate of 500.0 mV/s the peak current was 10.2 µA. Determine the diffusion coefficient, D, for o-DIA D = 3.64 x10-8 Determine the peak current if the scan rate is reduced to 150.0 mV/s. m²/ cm

Principles of Instrumental Analysis
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Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
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Chapter25: Voltammetry
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The oxidation of o-dianisidine (o-DIA) is electrochemically reversible and involves the transfer of two electrons. Linear sweep
voltammetry was performed on a 2 M H₂SO solution containing 2.81 mM of o-DIA using a carbon paste electrode with an
area of 3.52 mm². At a scan rate of 500.0 mV/s the peak current was 10.2 µA. Determine the diffusion coefficient, D, for o-DIA.
D = 3.64 x10-8
Determine the peak current if the scan rate is reduced to 150.0 mV/s.
pe
5.4 x10-6
Incorrect
cm²/s
HA
Transcribed Image Text:The oxidation of o-dianisidine (o-DIA) is electrochemically reversible and involves the transfer of two electrons. Linear sweep voltammetry was performed on a 2 M H₂SO solution containing 2.81 mM of o-DIA using a carbon paste electrode with an area of 3.52 mm². At a scan rate of 500.0 mV/s the peak current was 10.2 µA. Determine the diffusion coefficient, D, for o-DIA. D = 3.64 x10-8 Determine the peak current if the scan rate is reduced to 150.0 mV/s. pe 5.4 x10-6 Incorrect cm²/s HA
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