1. During recrystallization, an orange solution of a compound in hot alcohol was

Question

1. During recrystallization, an orange solution of a compound in hot alcohol was treated with activated carbon and then filtered through fluted paper. On cooling, the filtrate gave gray crystals, although the compound was reported to be colorless. Explain why the crystals were gray and describe steps that you would take to obtain a colorless product.

2. The solubility of acetanilide in hot water (5.5 g/100 ml at 100 o C) is not very great, and its solubility in cold water (0.53 g/ 100 ml at 0 o C) is significant. What would be the maximum theoretical percent recovery from the crystallization of 5.0 g of acetanilide from 100 ml water. (assuming the solution is chilled at 0 o C).

3. If your experiment yield of acetanilide is greater than 100%, how could this occur?

4. Describe how would you separate a mixture of acetanilide and sand.

5. Why is fluted paper usually used when doing hot filtration during recrystallization?

Explanation / Answer

There are multiple questions here. . i am allowed to answer only 1 at a time. I will answer question 1 for you.Please ask rest as different question.

Initially we have treated with carbon so this carbon becomes part of the solution. Those gray colors are due to these residue of carbon.

These carbon can be separated by very fine filtration. For this redissolve them nicely to form solution and then filter them off. Carbon will form filtrate

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.