Determination of Chlorinity of Water without the Use of Chromate Indicator

Table 1

Change in pH at various values of initial pH with Na₂HPO₄.

Initial pH	pH range	ΔpH
5.1	5.1–3.7	1.4
6.0	6.0 –3.8	2.2
7.0	7.0 –3.9	3.1
7.9	7.9–4.0	3.9