Which of the following alcohols is least soluble in water?

methanol, CH3OH
n-butanol, C4H9OH
n-pentanol, C5H11OH
n-octanol, C8H17OH

Answer:
n-octanol the longer the carbon chain, the less soluble the alcohol becomes.
n-octanol
n-Octanol, the longer the carbon the chain the more non-polar it becomes. Water is a polar molecule and therefore prefers methanol becuase it can more easily hydrogen bond to it.
n-octanol

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