Question

Which of the following substances is more likely to dissolve in water? Which of the following substances is more likely to dissolve in water? HOCH2CH2OH O || CH3(CH2)9CH CCl4 CHCl3 CH3(CH2)8CH2OH

Answer 1

Answer:

HOCH₂CH₂OH

Explanation:

You generally assume that polar dissolves polar and nonpolar dissolves nonpolar.  Since water is polar, we are looking for a polar molecular.  

This cancels out CH₃(CH₂)₉CH and CCl₄.

You are left with CHCl₃, CH₃(CH₂)₈CH₂OH, and HOCH₂CH₂OH.  You would pick the third option since it is the most polar.

Answer 2

The compound HOCH2CH2OH having two O - H groups is more likely to interact with water.

A substance is soluble in water if it is capable of interacting in an electrostatic interaction. Water can form hydrogen bonds with other molecules that posses polar O - H bonds.

Hence, looking at the options provided in the question, we will observe that the compound HOCH2CH2OH having two O - H groups is more likely to interact with water.

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