Pre-Laboratory Assignment 1. Briefly explain why (a) you should not heat organic

Question

Pre-Laboratory Assignment 1. Briefly explain why (a) you should not heat organic solvents over a Bunsen burner flame. b) you should add activated carbon to a cool solution and then heat the misture to boiling rather mixture to boiling ra than add the carbon to a boiling solution. 2. Indicate a procedure to solve the following recrystallization problems (a) oiling out (b) lack ol crystal formation (e presence of colored impurities (d) premature recrystallization in the funnel stem during gravity filtration

Explanation / Answer

1)b) because when you have the cold solution and add the activated carbon the impurities will attachet to the active site and if you add the carbon when the solution is hot, probably the impurities will be disolved in the solution and won't attachet to the carbon.

2) a) decant the solution or destilate

b) rub a glass wand against the glass containing the solution so it can be a base for the cristal formation

c)add activate carbon

d) you can redisolve it with the solvent or extract and wash it to eliminate the mother liquid

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

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