Explain : Methanol is more soluble in water than propan-l-ol.

1.	Explain : Methanol is more soluble in water than propan-l-ol.
Answer» (1) Methanol being lower members of alcohols is more soluble in water, but as the size of an alkyl group or molecular weight of alcohol increases the solubility decreases. (2) The solubility of methanol in water is due to polar characters of alcohols (R – O^-δ - H^+δ) and water (H^+δ – O^-δ – H^+δ). (3) The solubility of methanol is due to the formation of intermolecular hydrogen bonding between polar molecules of methyl alcohol and water. Hence, Methyl alcohol is a associated liquid. (4) In methyl alcohol, size of methyl group being very small, -OH group constitutes major part of the molecule giving more solubility. As size of alkyl group increases, the non-polar character increases the solubility decreases. Hence, Methanol is more soluble in water than propan-l-ol.

Answer»

(1) Methanol being lower members of alcohols is more soluble in water, but as the size of an alkyl group or molecular weight of alcohol increases the solubility decreases.

(2) The solubility of methanol in water is due to polar characters of alcohols (R – O^-δ - H^+δ) and water (H^+δ – O^-δ – H^+δ).

(3) The solubility of methanol is due to the formation of intermolecular hydrogen bonding between polar molecules of methyl alcohol and water.

Hence,

Methyl alcohol is a associated liquid.

(4) In methyl alcohol, size of methyl group being very small, -OH group constitutes major part of the molecule giving more solubility.

As size of alkyl group increases, the non-polar character increases the solubility decreases.

Hence,

Methanol is more soluble in water than propan-l-ol.

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