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.