CHEM 3201 (Organk CHEM-I Quiz3 I. Consider the following solvent pairs. If mixed

Question

CHEM 3201 (Organk CHEM-I Quiz3 I. Consider the following solvent pairs. If mixed together, which pairs would form twe layers? If they form two layers, which solvent would be on top? (8 points) L. Hexanes and water 2. Water and methylene chloride 3. Methanol and hexanes 4 Ethanol and water 2a. If you test an unknown organde compound and fiad it to be seable in 5% aqueous NalicOh what functional group dors it probably ceatain Esplain.(4 oints) 2b.Identify the number of sterceisomers for 3-bromo-2,4,5-trichlerebesane.(4 points)

Explanation / Answer

Ans 1

Part 1

Hexanes and water

They are immiscible in each other

two layers will form

Lower the density, the layer will be on the top

Higher the density, the layer will be on the bottom

hexanes (density = 0.68 g/mL ) < water (density =1.0 g/mL)

Hexane will be on top and water will be on the bottom.

Part 2

Water and methylene chloride

They are immiscible in each other

two layers will form

Lower the density, the layer will be on the top

Higher the density, the layer will be on the bottom

methylene chloride (density = 1.33 g/mL ) > water (density =1.0 g/mL)

water will be on top and methylene chloride will be on the bottom.

Part 3

Methanol and hexanes

They are immiscible in each other

two layers will form

Lower the density, the layer will be on the top

Higher the density, the layer will be on the bottom

methanol (density = 0.79 g/mL ) > hexanes (density =0.68 g/mL)

hexanes will be on top and methanol  will be on the bottom.

Part 4

Ethanol and water

they are Miscible in each other and will not form two layers

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