Procedure 5.3.a Electrochemistry of

All glassware and plasticware must be acid-washed with concentrated H2S04 and 3 M HC1, respectively, to remove trace metal ions. Use purest H20 available for solutions. 

Safety warning Operations set off between the lines must be performed in a fume hood. 

TABLE 5.2 Preparation of [Co(en)3]3+ Solution and Background Electrolyte (25 ml Total Volume) 

Complex Reaction Concentration MW Stock Concentration d. (g ml ) Amount Needed 

Calculate the amounts of reagents needed to prepare the following reaction solution in 25 ml total volume 5x 10-3 m [Co(en)3]3+ 0.01 M HN03 0.06 m KN03 0.1 M en. Record in Table 5.2. 

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