1. Use an Aldrich catalog to complete the following table: M.W Hazards Acetone E

Question

1. Use an Aldrich catalog to complete the following table: M.W Hazards Acetone Ethanol Where should the thermometer bulb be placed in order to measure the temperature of the hot vapor accurately during distillation? 4. What is the purpose of the "packing" in a fractional distillation column? 5. why should a distillation flask never be more than ¾ full before starting a distillation? 6. You are fractionally distilling 75 mL of a 50:50 solution of cyclohexane and toluene. After 2 mL has distilled you collect a sample for analysis. It is determined that your sample contains a mixture that is 85:15 cyclohexane/toluene. Calculate the total number of theoretical plates if the relative volatility () of the original solution is 2.41.

Explanation / Answer

Ans 1 :

Acetone is CH3COCH3 . It is a ketone and its IUPAC name is 2-propanone.

Its M.W. (molecular weight) is 58.08 g/mol

Its bp (boiling point) is 56oC

Hazards : Dermatitis , eye and lung irritation etc

Ethanol is CH3CH2Oh. It is an alcohol

Its M.W is 46.07 g/mol

Its bp is 78.37oC

Hazards : eye and skin irritation , dizziness , headache etc

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