Synthesis of a Coordination Compound

Procedure

In this experiment, you will prepare the coordination compound potassium trioxalatoferrate (III) trihydrate from potassium oxalate hydrate and ferric chloride KClOHOCFeKFeClOHOCK 33])([3 2342332422

KClOHOCFeKFeClOHOCK 33])([3 2342332422 KClOHOCFeK

FeClOHOCK

33])([

3

23423

32422

Procedure

Weigh and record the mass of a 150 mL beaker Weigh about 12 g and record the mass (0.00X

g) Add 20 mL distilled H2O (use a graduated cylinder) and

place the beaker onto a hot plate, warm gently(dial on less than 3), stirring the solution until it is dissolved

CAREFULLY remove the beaker from the heat Add 8 mL Ferric Chloride to the beaker with the hot

solution (record the molarity of the FeCl3), stir well, cool to 0ºC in an ice bath until it crystallizes (FeCl3 in hood) Label your beaker, sticker + sharpie in front desk

Decant (or pour off) the solution, keeping the solid in the beaker

OHOCK 2422

Procedure

Add 20 mL warm distilled H2O to the solid, stir to dissolve Note that NO methanol was used

Cool solution to 0°C for re-crystallization Collect the product via vacuum filtration

Put filter paper on before vacuuming Interrupt the suction, pouring a few mL of ice cold distilled

H2O on the product, stirring slightly Spread the crystals onto a paper towel and allow to dry

for at least 20 min Weigh your product after in a beaker Dispose green crystals in waste jar in back of hood

Finally…

Weigh your product Remember the equation for this reaction is (p116):

Molecular weights can be found online Use the mass data to calculate actual yield and

percent yield

KClOHOCFeK

FeClOHOCK

33])([

3

23423

32422

Due by end of lab

Pre-lab for coordination compound Complete data tables and calculations as

per the blue lab notebook (page 120) – determine the experimental yield and percent yield

Enter lab data in computer

Due next week

Pre-lab and quiz zinc iodide/empirical formula

Do a histogram on % yield distribution of class ofr the coordination compound Short 1 paragraph summary (1 page or less)

analyzing the histogram and class data Look at excel cliff notes on how to do a

histogram