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A sample of iron ore, weighing 0.700 g, ...

A sample of iron ore, weighing 0.700 g, is dissolved in nitric acid. The solution is then, diluted with water, following with sufficient concentrated aqueous ammonia, to quantitative precipitation the iron as `Fe(OH)_(3)`. The precipitate is filtered, ignited and weighed as `Fe_(2)O_(3)`. If the mass of the ignited and dried preciipitate is 0.541 g, what is the mass percent of iron in the original iron ore sample (Fe=56)

A

`27.0 %`

B

`48.1 %`

C

`54.1%`

D

`81.1 %`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The composition of a sample of wustite is Fe_(0.93)O_(1.0) . What is the percentage of iron present as Fe^(3+) ?

    A
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