3. Calculate the Ni concentration (mg/ml) based on the following data:
Solution Current at 1.1V, µA
25.0 ml 0.2M NaCl diluted to 50 ml 8.4
25.0 ml 0.2 M NaCl 10 ml sample solution diluted up to 50.0 ml 46.3
25.0 ml 0.2 M NaCl 10 ml sample solution 5.0 ml 2.3*10-2 mg/ml Ni2, then diluted to 50.00 ml. 68.4

(Voltammetric analysis)

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