Friday
July 3, 2015

Homework Help: Chemistry

Posted by Terry on Friday, May 2, 2008 at 1:58pm.

a) Find the empirical formula for KxFey(C2O4)znH2O given % percents:

potassium = 34.5%
iron = 11.4%
water = 11.0%
oxalate = 43.1 %

b) Insert values for x, y, z into KxFey(C2O4)znH2O then give correct coefficients to balance the equation:
_Fe(NH4)2(SO4)2*6H20 + __H2C2O4 + __K2C2O4 + H2O2 --> __K3Fe(C2O4)3*3H20 + __(NH4)2SO4 + __H2SO4 + H20

I have this part, I know that it's

2 Fe(NH4)2(SO4)2*6H20 + 3 H2C2O4 + 3 K2C2O4 + 1 H2O2 --> 2 K3Fe(C2O4)3*3H20 + 2 (NH4)2SO4 + 2 H2SO4 + 2 H20

c) Using the balanced equation and mass of Fe(NH4)2(SO4)2*6H20 (2.501g) determine the percent yield of KxFey(C2O4)znH2O.

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