Thermo Products 9678BNWP manual Suitable Titrants Titration Reaction

Suitable Titrants	Titration Reaction	Ref
potassium permanganate	5Sb+3 + 2MnO4¯ + 16H+ –›	2
(KMnO4)	5Sb+3 + 2Mn+2 + 8H2O
sodium bromate (NaBrO3)	BrO3¯ + 3As+3 + 6H+ –›	3
	Br¯ + 3As+5 + 3H2O
potassium permanganate	5H2O2 + 2MnO4¯ + 6H+ –›	5
(KMnO4)	5O2 + 2Mn+2 + 8H2O
sodium iodide (NaI)	in acid solution Cl2 +2I¯ –› I2 +	1
	2Cl¯, In basic solution
	2ClO¯ + 2I¯ –› I2 + 2Cl¯ + 2OH¯
sodium iodate ( NaIO3)	2I2 + IO3¯ + 5HCN + H+ –›	4
	5ICN + 3H2O
sodium thiosulfate	I2 + 2S2O3 -2–› 2I¯ + S4O6 -2	3
(Na2S2O3)
ceric sulfate [Ce(SO4)2]	Fe+2 + Ce+4 –› Ce+3 + Fe+3	2
(not recommended for
samples containing Cl¯)
potassium dichromate	Cr2O7 -2+ 6Fe+2 + 14H+ –›	3
(K2Cr3O7), recommended	2Cr+3 + 6Fe+3 + 7H2O
for samples containing Cl¯
ferrous sulfate (FeSO4)	MnO4¯ + 5Fe+2 + 8H+ –›	2
	Mn+2 + 5Fe+3 + 4H2O
potassium permanganate	3Mn+2 + 2MnO4¯ + 7H2O –›	1
(KMnO4)	5MnO3 + H2O + 4H+
ceric sulfate [Ce(SO4)2]	Sn+2 + 2Ce+4 –› Sn+4 + 2Ce+3	4
iodine (I2)	SO2 + I2 + 2H2O –›	1
	SO4-2+ 2I¯ + 4H+
sodium bromate (NaBrO3)	BrO3¯ + 3Ti+ 6H+ –›	3
	Br¯ + Ti+3 + 3H2O
Iodine (I2)	I2 + 2S2O3 -2–› 2I¯ + S4O6	3
potassium dichromate	3UO+2 + Cr2O7 -2+ 8H+ –›	3
(K2Cr2O7)	3UO2 +2 + 2Cr+3 + 4H2O
sodium iodate (NaIO3)	ZnHg(SCN)4 + 6IO3¯ + 6Cl¯ +	2
	8H+ –› Zn+2 + Hg+2 + 6ICl +

4HCN + 4SO4 -2

Redox/ORP Electrode User Guide 13