The Quantity Of Antimony In A Sample Can Be Determined

The amount of antimony in the sample can be determined by redox. Help? 3

The amount of antimony in the sample can be determined by the ratio of redox and oxidizing agent. A 7.99 g sample of stebin, a mineral antimony, is dissolved in concentrated HCl (aq) and placed in a reducing agent so that all antimony is in Sb3 (aq) form. Sb3 (aq) is completely oxidized in 32.4 ml of KBrO3 (aq) solution in 0.140 M water. This is the equation of unbalanced response

Br3 + Sb 3 +> Br + Sb 5 +

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

Please help the fool.

BrO3 {} + 3 Sb {3+} + 6 H {+} Â 'Br 3} + 3 Sb {5+} + 3 H2O

(0.0324 L) x (0.140 mol / L KBrO3) x (3 mol Sb / 1 mol KBrO) x (121.76 g Sb / mol) = 1.66 g Sb

(1.66 grams) / (7.99 grams) = 0.208 = 20.8% Sb