Sugar dissolving in water is a physical change and not a chemical one. Chemical changes only occur when new substances form. Dissolving sugar in water does not cause a chemical reaction to take place. More »

Physical changes do not produce new substances, but chemical changes do produce new substances. A physical change is concerned with states of matter. Melting, vaporization, freezing, sublimation and condensation are phys... More »

Cooking can be both a physical and chemical change. For example, mashing up potatoes is a physical change, but baking a cake is a chemical change. More »

Sugar water freezes faster than salt water, because salt has more molecules than sugar. Normally, water freezes at 32°F, however, when a substance is added to the water, it lowers its freezing point. This is not because ... More »

Sugar dissolves in water because both substances are polar substances. Water dissolves the majority of substances that are polar or ionic. The fact that sugar dissolves in water is unusual because most molecular compound... More » Science Chemistry Solutions & Mixtures

Sugar water is an example of a solid-liquid solution. Sugar, a solid, is the solute; water, a liquid, is the solvent. Dissolving the solid in the liquid creates the solution. More »

Matter changes via two processes: a physical change or a chemical change. Physical changes retain the fundamental identity of a substance without modifying its composition, while chemical changes alter matter into anothe... More »