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April 23, 2014

Homework Help: Chemistry

Posted by Marta on Monday, August 27, 2007 at 10:11am.

A mixture contains only NaCl and Fe(NO3). A 0.456g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is filtered, dried and weighed. Its mass is 0.107g. Calculate the following:

a. the mass of the iron in the sample
b. mass of Fe(NO)3.

How do I work out this question? Thank you.

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