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DETERMINING THE WATER OF CRYSTALISATION INTRODUCTION Water of crystallization is water, which is present in the compound but is not covalently bonded to the host molecule. Hydrated salt (also known as hydrate) is an ionic compound, which is associated with water of crystallization. To show how much the salt is hydrated the notation can be written: salt * nH2O; where n represents the number of water molecules per one molecule of salt. The aim of this investigation is to find the number of moles of water present in hydrated salt: copper sulphate (CuSO4). Equipment, materials and reagents. REAGENTS EQUIPMENT Copper sulphate - CuSO4 * crucible with lid * weight balance (accuracy ? 0.01g) * Bunsen burner * tangent * crucible tongs * clock (accuracy ? 1s) Variables. DEPENDENT VARIABLES CONTROLLED VARIABLES INDEPENDENT VARIABLES FIXED VARIABLES * mass of salt * type of salt * humidity * temperature * pressure Environmental care and safety. The product is obtained in a small amount and does not make up a potential danger for the environment, thus it...

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