2. The potential of the fluoride-selective electrode in a 0.0012 M sodium fluoride solution is 230 mV. Calculate the electrode potential in a 0.005 M solution of the same salt if the slope of the electrode function is 3 mV greater than the theoretical value. How will the electrode potential change if chlorine ions are added to this solution to a concentration of 0.0002 M. Selectivity coefficient K(F/Cl) = 0.0003. Neglect dilution.

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