AP BIOLOGY

Detailed explanation-1: -At the molecular level, salt dissolves in water due to electrical charges and due to the fact that both water and salt compounds are polar, with positive and negative charges on opposite sides in the molecule. This allows the water molecule to become attracted to many other different types of molecules.

Detailed explanation-2: -Water can dissolve a large number of substances. But in a fixed amount of water, different amounts are dissolved for different substances.

Detailed explanation-3: -Because of its polarity and ability to form hydrogen bonds, water makes an excellent solvent, meaning that it can dissolve many different kinds of molecules.

Detailed explanation-4: -Answer: Not all materials are soluble with water. Some completely dissolve with it whereas some just remain at the bottom if remain undisturbed. Some examples of soluble substances are: Salt, sugar, potassium permanganate, glucose, milk etc.