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Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20g of the crystals will be ____?

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answer is 4.53 GRAM.

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Detailed Solution

100 g of ZnSO4·xH2O contain 22.65 g of ZnThen 20g of ZnSO4·xH2O contain _____g of Zn Weight of Zn in 20 g of ZnSO4 is 20×22.65100=4.53g . Allowed values = 4.2 to 4.6

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Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20g of the crystals will be ____?