Question

Explain the difference in recrystallization proceedures used depending on the compound to be purified and the...

Explain the difference in recrystallization proceedures used depending on the compound to be purified and the nature of the contaminants.

Discuss the the % recovery you obtained. What are the causes of losses?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Recrystallization procedures depend on the compound to be purified and the nature of the contaminants. Suppose, if the compound and the impurity is soluble in hot and the compound insoluble or slightly soluble when the solvent is cold but the impurity is soluble in cold; then pure compound will result upon cooling. But if the impurity is not soluble in cold solvent, then impure compound will result upon cooling provided the compound is soluble in hot and insoluble in cold.

You cannot recover 100% of compound by recrystallization technique. Because small portion of compound always will be soluble in the cold solvent. But repeating the same procedure for a series of times will always result good yield.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In this experiment, we purified cyclohexene by distillation. Could we have used recrystallization instead to purify?...
In this experiment, we purified cyclohexene by distillation. Could we have used recrystallization instead to purify? Explain.
Remember, your recrystallization is successful if you've purified your material. Which analytical technique that you performed...
Remember, your recrystallization is successful if you've purified your material. Which analytical technique that you performed on the purified material is the best measure of purity. Explain how your results demonstrate that your compound is pure or impure, making certain to compare your results to literature.
Explain briefly why recrystallization can never result in 100% mass recovery even if you used pure...
Explain briefly why recrystallization can never result in 100% mass recovery even if you used pure material. Also explain why mass recovery is greater if you cool to 0 degrees C rather than room temperature. Explain very briefly why mass recovery is reduced if you use an excess amount of boiling solvent and why washing product crystals with excessive amounts of solvent especially warm solvent can result in reduced mass recovery.
Explain, why it is important that compound of interest should be highly soluble at boiling point...
Explain, why it is important that compound of interest should be highly soluble at boiling point and exhibit low solubility at room temperature in solvent for recrystallization. Discuss briefly what will happen if compound show high solubility at the room temperature
RECRYSTALLIZATION Pre Lab Questions 1. Complete the following table: Compound Structure Solubility in Hot Water Solubility...
RECRYSTALLIZATION Pre Lab Questions 1. Complete the following table: Compound Structure Solubility in Hot Water Solubility in Cold Water Acetanilide Sugar 2. What is the literature (known) melting point for acetanilide? 3. A student performed a recrystallization to purify a crude sample from a reaction. The amount of crude material collected from the reaction was 13.56 grams. After the purification, the student collected 8.97 grams of extremely pure material. a. What is the percent recovery of the desired material? b....
Thoroughly explain the difference between a compound, a mixture, a solution, and a suspension.
Thoroughly explain the difference between a compound, a mixture, a solution, and a suspension.
Explain difference between a hydrocarbon ring structure and that of an aromatic compound
Explain difference between a hydrocarbon ring structure and that of an aromatic compound
Discuss the effects of interspecific and intraspecific competition on niche breadth. Explain what causes the difference.
Discuss the effects of interspecific and intraspecific competition on niche breadth. Explain what causes the difference.
1. A confiscated white substance, suspected of being methamphetamine, was purified by a forensic chemist and...
1. A confiscated white substance, suspected of being methamphetamine, was purified by a forensic chemist and subected to elemental analysis. Combustion of a 50.86 mg sample yielded 150.0 mg of CO2 and 46.05 mg of H2O. Analysis for nitrogen showed that the compound contained 9.39% N by mass. The molecular formula of methamphetamine is C10H15N. a. Determine the empirical formula for the unknown white substance. b. Can the forensic chemist conclude that the suspected compound is methamphetamine? Explain. 2. The...
Explain why TR reacts differently to a price change depending on the type of elasticity of...
Explain why TR reacts differently to a price change depending on the type of elasticity of demand you have. (Why ... not just what the reaction is ...)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT