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.

Chemistry - bobpursley, Monday, August 27, 2007 at 10:26am
for the mass of iron, take the percent composition of iron in iron hydroxide times the mass.

for the mass of feNO3, you have the mass of iron, use percentage composition agian to get the mass of the iron nitrate.
Chemistry - Anonymous, Monday, August 27, 2007 at 9:32pm
thank you so much for your help!
Chemistry - tvtr, Sunday, May 19, 2013 at 8:59am
4555677777
Chemistry - tvtr, Sunday, May 19, 2013 at 9:00am
4555677777

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