Abstract
Oxidations of antimony(III), hydrazine and nitrite by peroxodiphosphate in perchloric acid medium occur as, Sb(III)+ H 2 P 2 O 8 2−→ Sb(V)+2 HPO 4 2 N 2 H 4+2 H 2 P 2 O 8 2→ N 2+4 H 2 PO 4 2 HNO 2+ N 2 P 2 O 8 2−+ N 2 O→ HNO 3+2 H 2 PO 4 2− The rate does not depend on the concentration of the reducing substance and the mechanism is essentially a hydrolytic one. A white precipitate of antimony(III) phosphate with absorbed antimony(V) is formed.
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