Question
To determine the amount of magnetic, Fe 3 O 4 , in an impure ore, a 1.5419-g sample is dissolved in concentrated HCl, giving a
To determine the amount of magnetic, Fe 3 O 4 , in an impure ore, a 1.5419-g sample is dissolved in concentrated HCl, giving a mixture of Fe 2+ and Fe 3+ . After adding HNO 3 to oxidize Fe 2+ to Fe 3+ and diluting with water, Fe 3+ is precipitated as Fe(OH) 3 by adding NH 3 . Filtering, rinsing, and igniting the precipitate provides 0.8525 g of pure Fe 2 O 3 . Calculate the %w/w Fe 3 O 4 in the sample.
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Physics
Authors: James S. Walker
5th edition
978-0133498493, 9780321909107, 133498492, 0321909100, 978-0321976444
