5. Determine the concentration of NaCl in the solution (g/l) if the following results were obtained during potentiometric titration of 25.00 ml of this solution with a 0.15 N solution of AgNO3:
V (AgNO3), ml 15.0 20.0 22.0 24.0 24.5 24.9 25.0 25.1 25.5
E, mV 307 328 342 370 388 428 518 606 646

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