Thallimetric oxidations-IV Estimation of malonic acid.
Malonic acid is quantitatively oxidized to carbon dioxide and water when refluxed for 120 min in sulphuric acid medium (concentration 1.5M) with at least four times as much thallium(III) as that stoichiometrically required for complete oxidation. The thallium(I) formed is estimated bromatometrically in the presence of 1.5-2M hydrochloric acid, with Methyl Orange as indicator. The indicator correction is negligible. The relative mean deviation is 0.2%. Possible side-reactions and their suppression are discussed.
Sagi
S R
SR
Inorganic Chemistry Laboratories, Andhra University, Waltair 530003, India.
Rao
K A
KA
Rao
M S
MS