Calculate the amount of Co (II) deposited on the surface of a cathode, if a constant current of 0.96 A for 28.4 minutes is passed through solution of Co (II). Assume that current efficiency is 90%.
See Answer →Write the advantages of coulometric titrations.
See Answer →A solution of Zn is electrolysed for 30 s using a current of 1.0 mA. Calculate the mass of Zn plated on the electrode for the electrochemical reaction: Zn2+ + 2e → Zn
See Answer →Describe concentration polarisation. Give the importance of overvoltage.
See Answer →Give some applications of ion selective electrodes.
See Answer →Discuss the factors which limit the accuracy of pH measurements.
See Answer →At 298 K, the limited molar conductivities at infinite dilution of sodium benzoate, hydrochloric acid and sodium chloride are 8.24 × 10‒3 S m2 mol‒1, 4.26 × 10‒2 S m2 mol‒1 and 1.26 × 10‒2 S m2 mol‒1, respectively. Calculate the limiting molar conductivity of aqueous benzoic acid.
See Answer →How is the conductance varied with concentration? Explain with the help of suitable examples.
See Answer →Calculate the potential of the cell given below
Hint: use Appendix I for the standard electrode potential values.
See Answer →Derive an expression for the determination of an equilibrium constant using electrode potential measurement.
See Answer →Briefly describe the role of computers in analytical instrumentation.
See Answer →Enumerate the advantages and disadvantages of the use of organic precipitants in inorganic gravimetric analysis.
See Answer →Define and differentiate between coprecipitation and post precipitation.
See Answer →What are adsorption indicators? Explain the principle of adsorption indicators taking the example of Fajan’s method for the determination of chloride ions using silver nitrate.
See Answer →What is meant by a precipitation titration curve? What factors need to be considered while designing an analytical determination based on precipitation titration?
See Answer →What are metallochromic indicators? Explain the principle of action of metallochromic indicators and outline the essential requirements that must be met by an indicator to be used for the visual detection of end points in complexometric titration.
See Answer →Define and differentiate between stepwise and cumulative formation constants with the help of an example.
See Answer →What is the importance of redox titrations in non-aqueous medium? What are the criteria for the selection of a suitable solvent for use in non-aqueous redox studies?
See Answer →Compute the standard electrode potential of the cell in which the following reaction takes place and write the Nernst equation for the cell.
Calculate the pH at different stages of a titration between 100 cm3 of 0.01 M formic acid and 0.01 M NaOH and draw the titration curve. Given: Ka (Formic acid) = 1.7 x 10- 4 . Suggest a suitable indicator for the titration.
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