Question

Which statement about 2‑methyl‑1‑propanol, (CH3)2CHCH2OH , and 1,3‑propanediol, HOCH2CH2CH2OH is true? 2‑Methyl‑1‑propanol is more soluble in water than 1,3‑propanediol because 2‑methyl‑1‑propanol has a smaller molecular mass. 2‑Methyl‑1‑propanol is more soluble in water than 1,3‑propanediol because 2‑methyl‑1‑propanol forms fewer hydrogen bonds with water. 1,3‑Propanediol is more soluble in water than 2‑methyl‑1‑propanol because 1,3‑propanediol has a smaller molecular mass. 1,3‑Propanediol is more soluble in water than 2‑methyl‑1‑propanol because 1,3‑propanediol can form multiple hydrogen bonds with water.

Answer 1

Propane-1,3-diol is more soluble in water than 2-methylpropan-1-ol because propane-1,3-diol can form more hydrogen bonds with water.

Step-by-step explanation:

The structures of the two compounds are shown below.

The two compounds have almost the same molecular mass (72 vs 74), so the important factor must be the number of OH groups.

Thus, propane-1,3-diol is more soluble in water than 2 methyl 1 propanol because propane-1,3-diol can form more hydrogen bonds with water.

A and C are wrong. The molecular masses of the two compounds are almost identical.

B is wrong. Fewer hydrogen bonds would make 2-methylpropan-1-ol less soluble.