AP BIOLOGY

Detailed explanation-1: -Hydrophobic means lacking an affinity for water; insoluble in water; repelling water. Examples of hydrophobic molecules include alkanes, oils, fats, and greasy substances in general.

Detailed explanation-2: -Hydrophobic and hydrophilic are opposites. The word stem ‘hydr’ comes from the greek ‘hydor’ meaning water, therefore hydrophobic materials are ‘water-fearing’, and do not mix with water, whereas hydrophilic materials are ‘water-loving’ and have a tendency to be wetted by water.

Detailed explanation-3: -…of the molecule, which is hydrophobic (“water-hating”), is larger with increased molecular weight. Because they are strongly polar, alcohols are better solvents than hydrocarbons for ionic compounds and other polar substances.

Detailed explanation-4: -Hydrophobic materials are those based on the chemical concept of hydrophobicity, i.e. the ability of the substance to repel water. Hydrophobicity is a term derived from the Greek “hydro”, meaning water, and “phobos”, meaning fear.

Detailed explanation-5: -Having an affinity for water. A membrane which will wet with aqueous (water) solutions. Hydrophilic membranes are generally chosen for use with aqueous solutions.