The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent. A 7.05 gsample of stibnite, an ore of antimony, is dissolved in hot, concentrated HCl(aq) and passed over a reducing agent so that all the antimony is in the form Sb3+(aq).The Sb3+(aq) is completely oxidized by 34.8 mL of a 0.115 M aqueous solution of KBrO3(aq).

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