Alcohols are organic molecules that have a very polar -OH unit somewhere. That\'s the soluble part, or the \"Like\" part that interacts with water. For instance methanol (CH3OH) or ethanol (CH3CH2OH) are infinitely soluble in water or miscible with water. As the organic molecule gets bigger, e.g., (CH3CH2CH2CH2CH2CH2CH2CH2CH2-OH) then the interactions of the other part of the molecule, or the nonpolar part of the molecule become very significant. Since these types of interactions are mostly dispersive in nature, water has a harder time disrupting those interactions to cause the solvation process to proceed. Solution Alcohols are organic molecules that have a very polar -OH unit somewhere. That\'s the soluble part, or the \"Like\" part that interacts with water. For instance methanol (CH3OH) or ethanol (CH3CH2OH) are infinitely soluble in water or miscible with water. As the organic molecule gets bigger, e.g., (CH3CH2CH2CH2CH2CH2CH2CH2CH2-OH) then the interactions of the other part of the molecule, or the nonpolar part of the molecule become very significant. Since these types of interactions are mostly dispersive in nature, water has a harder time disrupting those interactions to cause the solvation process to proceed..