6. Determine the concentration of KCN in the solution (g/l), if the following results were obtained during potentiometric titration of 20.0 ml of a 0.1000 N solution with silver nitrate:

V, AgNO3 , ml 5.0 7.0 9.0 9.5 9.9 10.0 10.1 10.5 11.0
E, mB -252 -216 -153 -116 24 326 340 340 340

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