Calculate percentage of water of crystallization in potash alum
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W.K.T molar mass of Cuso4.5H2O = 159.609 + 90 = ~250. Mass of water of crystallization = 5 * 18 = 90. Percentage = 90/250 * 100= 36%.
Actually, it refers to the water that is found in the crystalline framework and includes metal complex or salt. This have been found directly bonded to the metal cation.
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