If a test tube has 2 liquid layers in it. How do you tell which layer is organic

Question

If a test tube has 2 liquid layers in it. How do you tell which layer is organic and which is aqueous? What do the following abbreviations stand for (i) MP, (ii). BP, (iii). mL, (iv). g (v) mol, (vi) mg, (vii). MeOH, (viii). CH_2CI_2, (ix). RT, (x). D Describe 2 ways to remove solvent. Extraction is an important technique in organic chemistry, it is used in the "Extraction of Caffeine from Tea". Please describe how-extraction works include the important factors for an extraction solvent Give an example of a drying agent and how it is used. Explain how temperature effects the solubility of solids in liquids. Give examples If 32 g of aspirin is recrystallized and 15 g of pure aspirin was obtained what was the % recovery? Explain what sublimation is and give an example? If 2.3 g of benzoic acid (C_7H_6O_2) is retrieved from recrystallization how many moles were retrieved.

Explanation / Answer

5) Answer:

Based on the density we can know the layer.

The organic solvents like Pentane, Hexane, Ethers and Ethyl acetate are having lower density than water. So the water layer can see as a bottom layer and organic layer as a top layer in separating funnel.

The organic solvent like Dichloro methane is having higher density than water as a result of this we can see as a bottom layer in separating funnel.

6) Answer:

MP - Melting point

Bp - Boiling point

mL - Milli leter

g - grams

mol - mole

mg - milli gram

MeOH - Methanol

CH2Cl2 - Di chloro methane

RT - Room Temperature

D - Density

7) Answer:

Remove the solvent

1. Distillation under reduced pressure

2. Evaporation under atmospheric pressure

3. Lyophilization for water solvent.

  

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