Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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2. 0.4852 g sample of iron ore is dissolved in acid, oxidized to +3
state and precipitated as Fe,03 xH,O. The precipitate is filtered,
washed and ignited at 1000 °C to Fe,0, (159.6882) which
weighed 0.2481 g. Calculate % Fe (55.845) in the sample.
3. A sample containing only CaCO3 (100.0869) and
MgCO3 (84.3139) was ignited and carbonates converted to
their oxides. The mass of the oxides is equal to half the original
mass of the sample. Calculate % CaCO3 and % MgCO3 in the
sample. CaO(56.0774) MgO (40.304)
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Transcribed Image Text:2. 0.4852 g sample of iron ore is dissolved in acid, oxidized to +3 state and precipitated as Fe,03 xH,O. The precipitate is filtered, washed and ignited at 1000 °C to Fe,0, (159.6882) which weighed 0.2481 g. Calculate % Fe (55.845) in the sample. 3. A sample containing only CaCO3 (100.0869) and MgCO3 (84.3139) was ignited and carbonates converted to their oxides. The mass of the oxides is equal to half the original mass of the sample. Calculate % CaCO3 and % MgCO3 in the sample. CaO(56.0774) MgO (40.304)
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