Concentration problems

timer Asked: May 3rd, 2016

Question description

1. How many grams of CoCl2•6H2O would you need to make 50.00 mL of 0.338 M solution?

The waters of hydration are part of the solid and should be included when calculating the molar mass!

2. How many mL of a 0.575 M solution are needed to make 100.00 mL of a 0.0750 M solution?

3. A solution is made by weighing out 3.973 g of MgSO4•7H2O in a 25.00 mL volumetric flask, and diluting to the line. 5.00 mL of this solution are transferred to a 50.00 mL volumetric flask and diluted to the line. What is the concentration of the final solution (in the 50.00 mL volumetric flask)?

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