Question

Identify the compounds that are soluble in both water and hexane.

A) methanol and ethanol

B) ethanol and 1-butanol

C) ethanol and 1-propanol

D) 1-butanol and 1-pentanol

E) 1-propanol and 1-butanol

Answer 1

At first , it is con fusing that what are you talking about.. completely soluble or miscible?? So I m here mentioning for each compond.

for ethanol-

The unique solubility of ethanol is due mainly to its very versatile nature as it has both a polar and non-polar end. Hexane, which does not have a hydrogen group and is non-polar, is not soluble in or miscible with water, which is the most polar substance. But since ethanol has a non-polar hydrocarbon chain and a polar OH group, it is both soluble in and miscible with water and also miscible with hexane.

solubility in water-

methanol and propanol are miscible.. as the carbon chain increases the hydrophobic part also increases and solubility in water decreases. so 1-pentanol will be least soluble in water.

solubility in hexane-

As the number of carbon increases, the solubility of alchohol in hexane increases due to the same reason.

hope this answer will be helpfull to you. thank you