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1. A hot solution of a particular compound was allowed to cool to room temperature. After...

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Chemistry

1. A hot solution of a particular compound was allowed to coolto room temperature. After waiting a few minutes, it was noticedthat the crystallization had not taken place. Discuss two ways toinduce crystallization.

2. What properties are necessary and desirable for a solvent inorder that it is well suited for recrystallizing a particularorganic compound?

3. Assume that 3.0 g of aniline and 4.5 ml of acetic anhydrideare used in the preparation of acetanilide. What is the limitingreagent? What is the theoretical yield of acetanilide? What is? thepercentage yields if 3.3 g of acetanilide is obtained?

4. The solubility of compound A in ethanol is 0.4 g per 100 mlat 0o C and 5.0 g per 100 ml at 75 o C. What is the minimum amountof solvent needed to recrystallize an 8.0 g sample of compound A?How much would be lost in the recrystallization?

5. Impure acetanilide was dissolved in hot water. The solutionwas filtered hot and the beaker of solution was immediately placedin an ice-water bath instead being allowed to cool slowly. Whatwill be the result of cooling the solution in this manner?

Answer & Explanation Solved by verified expert
4.0 Ratings (432 Votes)
One way to induce crystallization is solvent evaporation In this technique a saturated solution is prepared in a suitable solvent This sample is left in a vial that has a perforated cap    See Answer
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