Final answer:
Yes, CH₃NH₂ (methylamine) is more soluble in water than CH₃CH₂CH₂NH₂ (propylamine) because it has a smaller alkyl group that allows it to better form hydrogen bonds with water.
Step-by-step explanation:
When comparing the solubility of CH₃NH₂ (methylamine) and CH₃CH₂CH₂NH₂ (propylamine), it is important to consider the ability of each compound to form hydrogen bonds with water. Methylamine, with a smaller hydrophobic alkyl group, is more likely to be soluble in water than propylamine, which has a larger hydrophobic alkyl group that can hinder solubility. Since solubility in water often involves the ability to hydrogen bond with water molecules and the polarity of the molecule, the compound with the shorter alkyl chain (CH₃NH₂) is generally more soluble than the one with the longer alkyl chain (CH₃CH₂CH₂NH₂). Therefore, the answer to the student's question is a) Yes, CH₃NH₂ is more soluble than CH₃CH₂CH₂NH₂.