Water of Crystallization refers to the water molecules that are integrated into the crystal structure of certain compounds. This water is essential for maintaining the stability and shape of the crystals. When these compounds are formed, water molecules become part of the solid structure, often influencing their physical properties. When these crystals are heated, the water of crystallization can be removed, leading to a process called dehydration. This can change the color and structure of the compound. Common examples include copper(II) sulfate and hydrated salts, which lose their water content when exposed to heat.