Calculate the molarity of these solutions:

1. 89.7g (NH₄)₂C₄H₄O₆ in 500cm³ of solution
2. 9.94g CoSO₄ in 250cm³ of solution
3. 5.23g Fe(NO₃)₂ in 0.1dm³ of solution

1. How much nickel (II) chloride is needed to make a liter of 3M solution?
2. How much silver fluoride is needed to prepare 500ml of 1.5M solution?
3. You need 250cm³ of 0.20M NaCl, but the only salt you have is in a 1.0M solution. Describe how you prepare the required solution?

1. How do you prepare 100cm³ of 0.1M CoCl₂ from a 0.52M solution of CoCl₂?
2. How many cubic centimeters of 0.69M Ba(NO₃)₂ are needed to prepare 200ml of 0.25M solution?
3. Given a standard solution of 2M NH₄Br, describe the preparation of 500ml of 0.15M ammonium bromide solution.