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The quantity of antimony in an ore can be determined by an oxidation - reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the Sb^3+(aq). The Sb^3+ (aq) is completely oxidized by a an aqueous solution BrO(3)^-

BrO(3)^- + Sb^3+ ---> Br^- + Sb^5+

complete and balance the equation for this reaction in acidic solution.

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