Make a flow chart of the purification scheme for the following scenario. 7. Benzaldehyde is used...

Make a flow chart of the purification scheme for the following scenario.

7. Benzaldehyde is used as the starting material for the synthesis of cinnamic acid. An organic chemistrystudent had made the mistake of stopping the reaction before it was complete and ended up with a mixture ofbenzaldehyde and cinnamic acid. Purify the cinnamic acid. Provide data to show your compound is pure.

Expert Solution

Benzaldehyde is a liquid, whereas cinnamic acid is solid. Hence, the mixture of benzaldehyde and cinnamic acid can be purified by recrystallization and the maximum amount of cinnamic acid can be recovered in 3 crops of the crystallization, as shown below.

Benzaldehyde + cinnamic acid Cinnamic acid (Major part) + mother liquor-1

Note: Mother liquor-1 = cinnamic acid (remaining after the first crop of crystallization) + benzaldehyde

Mother liquor-1 Cinnamic acid (major part remaining in first crop) + Mother liquor-2

Note: Mother liquor-2 = cinnamic acid (remaining after second crop of crystallization) + benzaldehyde

Mother liquor-2 Cinnamic acid (Almost all) + Mother liquor-3

Note: Mother liquor-3 = cinnamic acid (trace amount) + benzaldehyde

The purity of the cinnamic acid obtained in first crop of recrystallization will be highly (99.99%) pure.

queen_honey_blossom answered 2 years ago

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