3. During conductometric titration of 50 ml of acetic acid solution with 1 M potassium hydroxide solution, the following data were obtained:
V(KOH), ml 4.0 4.5 5.0 5.5 6.0 6.5 7.5 8.5
W, Ohm-1 37.5 34.0 31.1 28.5 26.6 26.4 27.5 28
Calculate the normal concentration and titer of the acetic acid solution.

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