Objectives:

After going via this unit, you should be able for

• Describe the principle of electrogravimetry,
• Describe ohmic potential (IR drop) and polarisation and their significance within electrodeposition,
• Compute the potential of a provided cell to initiate deposition of a metal ion and calculate the residual concentration of the ion in solution before the commencement of the deposition of the next ion,
• Define constant current and controlled potential electrogravimetry,
• Describes the importance of controlled potential electrogravimetry in the successive deposition of metal ions,
• Define coulometry and list the various categories of coulometers,
• Define potentiostatic coulometry - its instrumentation and applications,
• Define amperostatic coulometry - coulometric titrations and its instrumentation and applications,
• Describes the methods of in situ and external generation of reagents within coulometric titrations, and
• Describe the advantages of coulometric titrations and its applications.