140. Solving a chemistry problem

140. Solving a chemistry problem

79. Determine the concentration (mg / l) of zinc in the test solution, if the following results were obtained during amperometric titration of 10.0 ml of this solution with a solution of K4Fe (CN) 6 with a zinc titer of 0.00244 g / ml

V (K4Fe (CN) 6), ml
0.0 0.2 0.4 0.5 1.0 1.5 2.0
Id, μA
30 30 31 32 120 210 300

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