Predict whether each liquid is likely to be miscible with water.
a. Methylamine, CH $_{3}$ NH $_{2}$
b. Hexane, CH $_{3}$ CH $_{2}$ CH $_{2}$ CH $_{2}$ CH $_{2}$ CH $_{3}$

Question

Predict whether each liquid is likely to be miscible with water.
a. Methylamine, CH[latex]_{3}[/latex]NH[latex]_{2}[/latex]
b. Hexane, CH[latex]_{3}[/latex]CH[latex]_{2}[/latex]CH[latex]_{2}[/latex]CH[latex]_{2}[/latex]CH[latex]_{2}[/latex]CH[latex]_{3}[/latex]

Accepted Answer

You are asked to predict whether a liquid is miscible with water.
You are given the chemical formula for the compound.
Water is a polar molecule, and there are strong hydrogen bonds between water molecules in the liquid state.
a. Methylamine is a polar molecule. Based on the “like dissolves like” general rule, methylamine and water are miscible because they are both polar. In addition, both can form hydrogen bonds, a strong IMF.
b. Hexane is a nonpolar molecule. Based on the “like dissolves like” general rule, hexane and water are immiscible because they do not have similar IMFs.

Chapter 13

Q. 13.2.1

Q. 13.2.1

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