With the completion of the determinations of % potassium, % iron, and % oxalate in the...

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Chemistry

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 Â·zH₂O, has then been completely determinedexperimentally. The simplest formula (x,y,z) can now be calculatedfrom the the percentage composition. Once the formula is know it isthen possible to calculate the percent yield of product that wasobtained in the preparation and purification of the crystals.
You have entered the following values :
From Part A:
Mass of K_xFe(C₂O₄)_yÂ· zH₂O prepared : 6.000 g
Mass of FeCl₃ : 1.60 g
From Part B:
% Potassium in compound : 11.50 %
% Iron (from ion exchange & titration vs. NaOH) : 14.70 %
From Part C:
% Oxlate : 40.56 %

The questions below are part of the final analysis, they are dueat the beginning of the next lab, Tue Mar 31 08:30:00 am2020 (EDT).
Now, let's finish the calculation and the determinationof the formula of the iron compound:
Calculate the % water of hydration :
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 forC₂O₄^2-:
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)
Using your chemical knowledge and literature references (donâ€™tforget to include the references in your lab report and discusspossible sources of errors) answer the questions below:
Enter the simplest formula of the Iron Oxalate Complex Salt:
K Fe(C₂O₄) Â· H₂O
Now that the formula of the complex salt is known, thepercent yield can be determined.
Calculate the moles of FeCl₃ used in preparation:
Calculate the theoretical moles ofK_xFe(C₂O₄)_y Â·zH₂O:
Calculate the actual moles ofK_xFe(C₂O₄)_y Â·zH₂O synthesized:
Calculate the percent yield:

Answer & Explanation Solved by verified expert

3.9 Ratings (615 Votes)

1 Determination of molecular formula of KxFeC2O4y zH2O ie determination of x y and z composition any species means grams of that speciespresent per 100 grams of the complexTherefore Potassium K in compound 1150 means1150 g of K in 100 g of KxFeC2O4y zH2OMoles of K in 100 g complex Iron 1470 means 1470 g of Fe in 100 g ofKxFeC2O4y zH2OMoles of Fe in 100 g complex Oxlate 4056 means 4056 g ofC2O4in 100 g of KxFeC2O4y zH2OMoles of C2O4 in 100 g complex H2O 100 115014704056 3324mean 3324 g of H2O in 100 g of KxFeC2O4y zH2OMoles of H2O in 100 See Answer

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