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The group of chemist working on making alum has run across another problem. Par

ID: 999581 • Letter: T

Question

The group of chemist working on making alum has run across another problem. Par of the alum they found was accidently mixed into a batch of other chemicals. Now they must go through a process of separations to undo the mess. The team found 4 solvents that they could possibly use, but don't know which is more effective. They run alum against each solvent and attained Rf values of each. They put the values into a chart below. Which solvent should they use to remoe alum from the batch of chemicasl and why?

Explanation / Answer

The nonpolar compounds generally have high Rf values. But alum is a polar compound. it will be collected with least Rf value in which polarity will be found. Hence Solvent 2 is suitable to collect the given alum.