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Multiple Choice
Which functional group is generally the most soluble in water, assuming the number of carbons is equivalent?
A
Alcohol (–OH)
B
Aldehyde (–CHO)
C
Alkane (–CH3)
D
Ether (–O–)
Verified step by step guidance
1
Understand that solubility in water depends largely on the ability of a molecule to form hydrogen bonds with water molecules.
Identify the functional groups given: Alcohol (–OH), Aldehyde (–CHO), Alkane (–CH3), and Ether (–O–), and consider their polarity and hydrogen bonding capabilities.
Recall that alcohols (–OH) have a hydroxyl group capable of both donating and accepting hydrogen bonds, which greatly enhances their solubility in water.
Recognize that aldehydes (–CHO) and ethers (–O–) can accept hydrogen bonds but cannot donate them as effectively as alcohols, making them less soluble than alcohols but more soluble than alkanes.
Note that alkanes (–CH3) are nonpolar and cannot form hydrogen bonds, so they are generally the least soluble in water among the options.