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What is 'water of crystallization'? Name a crystalline salt which does not contain water of crystalliz
What would you observe, when the water of crystallization of a salt is removed by heating it
Define : i] Hygroscopy, ii] Efflorescence.
What is the effect of temperature on the solubility of KNO3 and calcium sulphate in water.
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Answers
Answer:
water of crystallization or water of hydration are water molecules that are present inside crystals. Classically, "water of crystallization" refers to water that is found in the crystalline framework of a metal complex or a salt, which is not directly bonded to the metal cation.
Sodium Nitrate, Potassium Chloride, Potassium Nitrate, Barium Sulphate are the salts which does not contain water of crystallization.
During heating, hydrated salt loses its water of crystallization by absorbing a certain amount of energy, called the enthalpy of dehydration.
Efflorescent: Efflorescent substances are solids that can undergo spontaneous loss of water from hydrated salts. Hygroscopic: Hygroscopic substances are solids that can absorb or adsorb water from its surroundings.
The solubility of KNO3 in water increases with the increase in temperature since dissolution of KNO3 in water is an endothermic process. The solubility of CaSO4 in water decreases with the increase in temperature since dissolution of CaSO4 in water is an exothermic process.