Determination of Chlorinity of Water without the Use of Chromate Indicator

Figure 2

(a) Potentiometric titration curves for 25.0 mL of 0.10 M NaCl with 0.50 M AgNO₃ in the presence of 3.2 mM EDTA at various starting pH values: (a) 8.1, (b) 7.0, (c) 6.0, and (d) 5.0. (b) Titration curves for 25.0 mL of 0.10 M NaCl with 0.50 M AgNO₃ at various concentrations of EDTA: (a) 0.70, (b) 3.2, (c) 6.3, and (d) 14.2 mM.

(a)

(b)