The Scientific Principle Behind Step E.
A. The scientific principle behind step A is all to do with burning the seaweed and turning into ash. To do this it had to be done with a Bunsen burner which was on the blue flame so it was at its hottest to turn the seaweed into ash.
B. In step B the scientific principle is the filtration of the purified water. The reason for the ash being boiled was to extract the iodine ions.
D. The scientific principles behind step D was the adding of hydrogen peroxide solution to the remaining solution we had. The reason for this was so that the hydrogen peroxide could convert the iodine ions into iodine.
E. In step E you had to transfer the mixture to a separating funnel. You then had to add 10cm3 of cyclohexane which was the scientific
principle in this step. The cyclohexane then dissolves in the solution which then needed to be shaken vigorously to make the two layers.
F. The scientific principle in step F is the cyclohexane creating a layer on top of the aqueous layer. The iodine is also dissolved by this point. Iodine is soluble in cyclohexane which means that all the impurities stay in the aqueous layer.
H/I. You then had to run the purple cyclohexane layer into an evaporating basin which was the scientific principle in step H. The reason for this was so that it could evaporate leaving crystals. This was also the scientific principle in step I as this was the iodine crystals forming.
B. In step B the scientific principle is the filtration of the purified water. The reason for the ash being boiled was to extract the iodine ions.
D. The scientific principles behind step D was the adding of hydrogen peroxide solution to the remaining solution we had. The reason for this was so that the hydrogen peroxide could convert the iodine ions into iodine.
E. In step E you had to transfer the mixture to a separating funnel. You then had to add 10cm3 of cyclohexane which was the scientific
principle in this step. The cyclohexane then dissolves in the solution which then needed to be shaken vigorously to make the two layers.
F. The scientific principle in step F is the cyclohexane creating a layer on top of the aqueous layer. The iodine is also dissolved by this point. Iodine is soluble in cyclohexane which means that all the impurities stay in the aqueous layer.
H/I. You then had to run the purple cyclohexane layer into an evaporating basin which was the scientific principle in step H. The reason for this was so that it could evaporate leaving crystals. This was also the scientific principle in step I as this was the iodine crystals forming.