Study of Complexes of Tannic Acid with Fe(III) and Fe(II)

Table 1

The amount of citric acid and sodium citrate at different pH values.

pH value	Amount of citric acid (g)	Amount of sodium citrate (g)
3.0	3.91	0.41
4.0	2.75	2.3
5.0	1.72	3.47
6.0	0.80	4.76