The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent. A 6.19 g6.19 g sample 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 30.5 mL of a 0.115 M aqueous solution of KBrO3⁢(aq). The unbalanced equation for the reaction is   BrO^−  3(aq) + Sb^3+(aq)⟶Br^−(aq)+Sb^5+(aq)(unbalanced) Calculate the amount of antimony in the sample and its percentage in the ore. mass of antimony in grams:     percentage of antimony:

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The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent. A 6.19 g6.19 g sample 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 30.5 mL of a 0.115 M aqueous solution of KBrO3⁢(aq). The unbalanced equation for the reaction is

 

BrO^−  3(aq) + Sb^3+(aq)⟶Br^−(aq)+Sb^5+(aq)(unbalanced)

Calculate the amount of antimony in the sample and its percentage in the ore.

mass of antimony in grams:
 
 
percentage of antimony:
 
 
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