Answer to Question #55506 in General Chemistry for KAte

Question

What is the molar concentration of Fe2+ ion in an aqueous solution if 35.50 mL of 0.103 M KBrO3 is required for complete reaction with 11.00 mL of the Fe2+ solution? The net ionic equation is:
6Fe2+(aq)+BrO3−(aq)+6H+(aq)→6Fe3+(aq)+Br−(aq)+3H2O(l).

What is the molar concentration of As(III) in a solution if 24.95 mL of 0.115 M KBrO3 is needed to titrate 54.45 mL of the As(III) solution? The balanced equation is
3H3AsO3(aq)+BrO−3(aq)→Br−(aq)+3H3AsO4(aq)

What is the mass percent Fe in a 0.1855 g sample if 12.32 mL of a 0.1015 M Sn2+ solution is needed to titrate the Fe3+?
Express your answer using four significant figures.