A pure salt contains an unknown metal cation (M) and the sulfate anion, where M belongs to either group IA or IIA. 1.42 g of this salt was dissolved in water and treated with an excess of aqueous calcium chloride resulting in the formation of a precipitate. The precipitate was collected, dried and found to weigh 1.36 g. Determine the atomic mass of M and identify M.

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Chapter19: Transition Metals And Coordination Chemistry
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Problem 14E: A 2.5624-g sample of a pure solid alkali metal chloride is dissolved in water and treated with...
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A pure salt contains an unknown metal cation (M) and the sulfate anion, where M belongs to either group IA or IIA. 1.42 g of this salt was dissolved in water and treated with an excess of aqueous calcium chloride resulting in the formation of a precipitate. The precipitate was collected, dried and found to weigh 1.36 g. Determine the atomic mass of M and identify M.

 
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