After that we have to boil the solution After the solution boiled we have to

After that we have to boil the solution after the

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the H2SO4 solution. After that we have to boil the solution. After the solution boiled, we have to allow the solution to cool until the temperature drop to the 60 . After that, we have to titrate the solution using KMnO4 solution as a titrant. The colour of solution is light green. After the titration reach end point, the colour of solution turn to pale pink. We have to beware to the end point because the colour can turn to the purple solution. It is because there is some error while titrate the solution. We have to repeat this part for 2 times. The average volume of KMnO4 solution is 7.05mL. For this part, we have to find the molarity using the part A. The molarity of KMnO4 is 0.0670M. The percent of oxalate in this part is 51.16%. The percentage purity of the complex in this part is 94.44%. The percentage purity is very high. It is good for experiment. There are some precautionary steps need to be considered during the experiment. Safety goggles, aprons, and gloves must be worn in lab at all times. This is because the materials that are used need to be handled properly. Oxalate is very toxic via oral and inhalation routes and severe kidney damage is possible if oxalate salts are taken internally. Oxalate compounds can be absorbed through the skin; gloves and washing affected areas with cold water are required. 1 M sulfuric acid is slightly corrosive. Wear gloves when handling these compounds and wash any affected areas thoroughly with cold water. KMnO4 is a very strong oxidizing agent and must not be poured into the organic collection bottles. During the titration, KMnO4 must not be added or swirled rapidly as it may result in brown coloration in your solution. This is due to the formation of manganese (IV) oxide (MnO2). If you have not added any more KMnO4 than needed to reach the endpoint, the excess oxalate should reduce the MnO2 momentarily. However, if you fail to swirl the sample and overshoot the endpoint while MnO2 is formed, the titration is ruined and must be performed again. CONCLUSION:
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The oxalate content in the K 3 [Cr(C 2 O 4 ) 3 . 3H 2 O is 31.32% , for K 2 [Cu(C 2 O 4 ) 2 (H 2 O) 2 ] is 49.74% while for K 3 [Fe(C 2 O 4 ) 3 ].3H 2 O is 51.16%. REFERENCES: 1. 2. dules_(Inorganic_Chemistry)/Coordination_Chemistry/Structure_and_Nomencla ture_of_Coordination_Compounds/Introduction_to_Coordination_Chemistry 3. JOTTER
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