Some further examples of coulometric titrations

Reagent. Supporting electrolyte. Prepare a 0.2 M sodium sulphate solution. 

Procedure. Experience in this titration may be acquired by titration of, say, 5.00 mL of accurately standardised 0.01 M sodium hydroxide solution. Use 50 mL of supporting electrolyte and a current of 30 mA. 

A selection of coulometric titrations of different types is collected in Table 14.2. It may be noted that the Karl Fischer method for determining water was first developed as an amperometric titration procedure (Section 16.35), but modern instrumentation treats it as a coulometric procedure with electrolytic generation of I2. The reagents referred to in the table are generated at a platinum cathode unless otherwise indicated in the Notes. 

Extensive summaries of the applications of coulometric analysis will be found in Refs 21 and 22. 

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