IODIMETRIC AND IODOMETRIC METHODS Flashcards
Is a direct analysis of REDUCING AGENT such as thiosulfate and arsenates by the use of IODINE
IODIMETRY
Is an indirect analysis of OXIDIZING AGENT such as ferric and cupric salts and is reduced with excess potassium iodide and the Iodine produced is titrated with a standard solution of Sodium thiosulfates.
IODIMETRY
INDICATOR IN IODIMETRY
STARCH
ASSAY OF ASCORBIC ACID:
titrant
0.1N IODINE
ASSAY OF ASCORBIC ACID:
indicator
STARCH
ASSAY OF ASCORBIC ACID:
endpoint
BLUE
ASSAY OF SODIUM HYPOCHLORITE:
titrant
0.1N SODIUM THIOSULFATE
ASSAY OF SODIUM HYPOCHLORITE:
indicator
0.1N SODIUM THIOSULFATE
ASSAY OF SODIUM HYPOCHLORITE:
endpoint
DISAPPEARANCE OF BLUE COLOR
ASSAY OF STRONG IODINE:
titrant
0.1N POTASSIUM ARSENITE
ASSAY OF STRONG IODINE:
indicator
STARCH
ASSAY OF STRONG IODINE:
endpoint
BLUE
in oxidation-reduction with 0.1N bromine (koppeshaar’s solution), ______ is employed as an oxidizing agent in the assay of aniline, phenol, & resorcinol
BROMINE
Bromine is liberated when the solution is
ACIDIFIED