A sample of iron ore weighing 0.2792 g was dissolved in an excess of a dilute acid solution. All the iron was first converted to Fe(II) ions. The solution then required 23.30 mL of 0.0194 M KMnO4 for oxidation to Fe(III) ions. Calculate the percent by mass of iron in the ore.
Chapter 2: Atoms, Ions, and Molecules: The Building Blocks of Matter Key: Calculate: Calc Number: # negative: neg + moles: mol (s) proton: p isotopes: iso 0 Average: avg molecules: molec neutron: n With: w/ electrons: e Chemical: chem positive: pos Learning Objectives