24. Solution to Chemistry Problem
1. To determine chloride ions in a sample, a 5.00 g sample was dissolved in a 100.0 ml volumetric flask, diluted with water to the mark, and the potential of the chloride-selective electrode was measured relative to the silver chloride reference electrode Ex— 95 mV. Calculate the mass of chlorides in 100.0 g of the sample using the data used to plot the calibration graph for the chloride-selective electrode:
a(Cl-), mol/l 1.0*10-1 1.0*10-2 1.0*10-3 1.0*10-4 1.0*10-5
-E, mV 60.0 108.0 162.0 218.0 270.0
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