Determination of Chlorinity of Water without the Use of Chromate Indicator

Figure 4

Titration curves of 40.0 mL of 0.1 M NaCl with a 0.1 M AgNO₃ solution in the presence of 2.5 mM Na₂HPO₄ at two different initial pH values: (a) 8.32 (■) and (b) 7.03 (○).