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1. what is the governing pricniple of voltammetry and how it relates to Nernst equation?
2. what is the difference between linear voltammetry, cyclic voltammetry and differential anodic stripping?
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- what is the difference between linear voltammetry, cyclic voltammetry and differential anodic stripping?For Cyclic Voltammetry this data is given from 13 ul aliquot of a 0.1 mM concentration. From this determine its concentration.(1) Suppose that cyclic voltammetry is carried out for one-electron reduction of a species, O, with a diffusion coefficient of 10–5 cm2/s using a 20 µm-radius spherical electrode. Sketch a cyclic voltammogram with its unique features at the scan rate of 10 V/s. Identify an appropriate equation from the textbook (Electrochemical methods) and use the equation to explain quantitatively why you think these features are observed. Assume that the reaction is reversible.
- Describe the principle and operation of anodic stripping voltammetry (ASV). How does it differ from adsorptive stripping voltammetry? What is the quantitative signal?a) Explain the operation of a counter current multiple contact shanks system. b) Discuss the method of calculation for multistage crosscurrent leaching.A polarogram with a dropping murcury electrode has a diffusion current of 18 microA. How much Zn2+ (in %) from 50.00 milliliters of 0.250mM solution is reduced during 2.8 minutes required to do the scan?
- An unknown cadmium(II) solution was analyzed. A 25.00-mL sample of the unknown solution produced a diffusion current of 1.86 mA. Following addition of a 5.00-mL aliquot of 0.00212 M Cd2+ standard solution to the unknown solution, a diffusion current of 5.27 mA was produced. A) What type of electroanalytical method was used? B) What type of calibration method was used? C) What is the molar concentration of Cd2+ in the unknown solution?Which of the following is/are correct about Beer's law? Polychromatic wurce of radiation cause a chemical deviations. II. Real deviation ocur due to the higher concentration Mistmatched cells for sample and reference cells cause an insurumental deviation. A) I. II, and III II and III C) I and III D) Only III E) Only IIHow can you tell from a cyclic voltammetry graph if the system is freely diffusing or adsorbing onto the electrode?
- A conductivity cell was calibrated using 0.01 M KCl (κ = 1.4087x10-3 S/cm) and the measured resistance was 688 Ω. a. Determine the cell constant (include units). b. Determine the molar conductivity, Λm for a 0.0100 M AgNO3 solution in the same cell with a resistance reading of 777Ω.For an electrochemically reversible redox process at a DME, why is the resulting AC polarogram peak shaped? How does the magnitude of the electron transfer rate constant influence the resulting AC polarogram?Write the faults of the glass electrode. (Please write it correctly and concisely.)
