An iron ore was anulyzed by dissolving a 1.1324-g sample in concentrated HCI. The resulting solution was diluted with water, and the iron(III) was precipitated as the hydrous oxide Fe O. xH;O by the addition of NH. After filtration and washing, the residue was ignited at a high temperature to give 0.5394 g of pure Fe,O, (I59.69 g/mol). Calculate (a) the % Fe (55.847 y/mol) and (b) the % Fe:Oa (231.54 g/mol) in the sample.
An iron ore was anulyzed by dissolving a 1.1324-g sample in concentrated HCI. The resulting solution was diluted with water, and the iron(III) was precipitated as the hydrous oxide Fe O. xH;O by the addition of NH. After filtration and washing, the residue was ignited at a high temperature to give 0.5394 g of pure Fe,O, (I59.69 g/mol). Calculate (a) the % Fe (55.847 y/mol) and (b) the % Fe:Oa (231.54 g/mol) in the sample.
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Chapter4: Chemical Reactions
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Problem 4.88QP: A 1.345-g sample of a compound of barium and oxygen was dissolved in hydrochloric acid to give a...
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An iron ore was anulyzed by dissolving a 1.1324-g sample in concentrated HCI. The resulting solution was diluted with water, and the iron(III) was precipitated as the hydrous oxide Fe O. xH;O by the addition of NH. After filtration and washing, the residue was ignited at a high temperature to give 0.5394 g of pure Fe,O, (I59.69 g/mol). Calculate (a) the % Fe (55.847 y/mol) and (b) the % Fe:Oa (231.54 g/mol) in the sample.
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