K2c Synthesis Lab Report

First, the synthesis of the coordination compound, KaFeb(ox)cdH2O, needed to be carried out. This was achieved by weighing out 8.29 grams of K2C2O4 with a Dial-a-gram balance. Once measured, the 8.29 grams K2C2O4 were placed in a 125 mL Erlenmeyer flask. 25 mL of deionized water were then added to the 125 mL flask and stirred with the K2C2O4 until complete dissolution was achieved. Next, 4.11 grams of FeCl3 were weighed out using the balance previously mentioned. Once the 4.11 grams were measured, the FeCl3 was placed in a 150 mL beaker. Then 10 mL of deionized water were added to the 150 mL beaker and stirred with the FeCl3 until complete dissolution occurred. The oxalate solution (K2C2O4H2O) from the 125 mL Erlenmeyer flask was added to the 150 mL beaker with iron(III) chloride solution (FeCl36H2O) and stirred thoroughly. 3 mL of deionized water were then added to the 125 mL Erlenmeyer flask, which previously held the oxalate
60 mL of deionized water were added to both 125 mL flasks as well as 6 mL of 6 M H2SO4. Then 1 mL of 85% concentration H3PO4 was added to each flask. The two 125 mL flasks with the green crystals, deionized water, 6 M H2SO4, and H3PO4 were then stirred. One of the solutions was then placed on a hot plate and heated to 80 ºC. A burette was rinsed with 3 mL of KMnO4. Once rinsed, the burette was filled with KMnO4 to an initial volume of 2.5 mL. The solution was placed under the burette and a stir bar was put in the 125 mL Erlenmeyer flask. The solution was then titrated with the KMnO4 in 1 mL intervals until a light pink color was achieved and held for 30 seconds. 31.10 mL of KMnO4 were added in order to achieve the desired color of light pink. The second solution was then also heated to 80 ºC and titrated with KMnO4 in the same way. 30.80 mL of KMnO4 were added to the second solution in order to achieve the desired light pink