Sunday

February 1, 2015

February 1, 2015

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

potassium = 34.5%

iron = 11.4%

water = 11.0%

oxalate = 43.1 %

b) Insert values for x, y, z into KxFey(C2O4)z·nH2O 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)z·nH2O.

- Chemistry -
**DrBob222**, Friday, May 2, 2008 at 2:22pma) Find the empirical formula for KxFey(C2O4)z·nH2O given % percents:

potassium = 34.5%

iron = 11.4%

water = 11.0%

oxalate = 43.1 %**Take a 100 g sample. That will give you**

34.5 g K

11.4 g Fe

11.0 g H2O

43.1 g oxalate (C2O4)

Now divide mols = g/molar mass.

From mols of each, determine the ratio of one to the other. The easy way to do this is to divide the smallest # mols by itself. That will make that element/polyatomic ion 1.000. Then, to keep things equal, divide the other mols by that same number, then round to the enarest whole number (but I caution not to round numbers from 0.4 to 0.6 up or down). That will give you the formula. Do that part, then we can talk about the remainder. You may be able to solve the rest of the problem after getting the formula.

**Answer this Question**

**Related Questions**

chemistry lab - Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and ...

Lab/Chemistry - In lab, I weighed out and found the molarity of 1.108g Na2C2O4 ...

Chemistry please help - In lab, I weighed out and found the molarity of 1.108g ...

chemistry - Really need help on figuring out the formula for Iron Complex. The ...

chemistry - This equation decribes oxidation of acidified solution of sodium ...

Chemistry - With the mass percent of Fe, oxalate ion, and water; find the mass ...

Chem - In lab, the ratio of moles C2O4^2-/Fe^3+ was 0.0063 to 0.0017, which is 3...

chemistry - Only 6.1 mg of calcium oxalate, Ca(C2O4) dissolves in 1.0 L of water...

Chemistry - Kc is 1.67 × 1020 at 25°C for the formation of iron(III) oxalate ...

Chemistry- urgent! - When a solution of sodium oxalate (Na2C2O4) is added to a ...