Question

With the completion of the determinations of % potassium, % iron, and % oxalate in the crystals, you may calculate the % water. The percentage compositionof the crystals, K_xFe(C₂O₄)_y · zH₂O, has then been completely determined experimentally. The simplest formula (x,y,z) can now be calculated from the the percentage composition. Once the formula is know it is then possible to calculate the percent yield of product that was obtained in the preparation and purification of the crystals.

From Part A:

Mass of K_xFe(C₂O₄)_y · zH₂O prepared : 4.800 g
Mass of FeCl₃ : 1.60 g

From Part B:

% Potassium in compound : 18.97 %
% Iron (from ion exchange & titration vs. NaOH) : 10.95 %

From Part C:

% Oxlate : 43.50 %

The questions below are part of the final analysis

Calculate the % water of hydration : 26.58

Calculate the following for Fe³⁺:

g in 100 g sample	mol in 100 g sample	mol/mol Fe (3 sig figs)	mol/mol Fe (whole number)

Calculate the following for K⁺:

g in 100 g sample	mol in 100 g sample	mol/mol Fe (3 sig figs)	mol/mol Fe (whole number)

Calculate the following for C₂O₄^2-:

g in 100 g sample	mol in 100 g sample	mol/mol Fe (3 sig figs)	mol/mol Fe (whole number)

Calculate the following for H₂O

g in 100 g sample	mol in 100 g sample	mol/mol Fe (3 sig figs)	mol/mol Fe (whole number)

Enter the simplest formula of the Iron Oxalate Complex Salt:

Now that the formula of the complex salt is known, the percent yield can be determined.

Calculate the moles of FeCl₃ used in preparation:

Calculate the theoretical moles of K_xFe(C₂O₄)_y · zH₂O:

Calculate the actual moles of K_xFe(C₂O₄)_y · zH₂O synthesized:

Calculate the percent yield:

Answer 1