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6. A chemist analyzes the sulfate salt of an unknown alkaline earth metal. The c

ID: 1077981 • Letter: 6

Question

6. A chemist analyzes the sulfate salt of an unknown alkaline earth metal. The chemist adds 1.273 g of th salt to excess barium chloride solution. After filtering and drying the mass of precipitate is found to be 2.468 g (a) Use the formula MS04 to represent the unknown salt. Write the molecular and net ionic equations for the reaction. (2) (b) Calculate the amount (in mol) of MS04 used in the reaction. (3) (c) Determine the molar mass of the unknown salt. (2) (d) What is the likely identity of the unknown metal cation? What test might the chemist perform to help confirm this conclusion? (3)

Explanation / Answer

6. A chemist analyzes the sulfate salt of an unknown alkaline earth metal. The c