Molarity Calculation Assignment #2     Name ______________   You need 250 cm3 of 0.20 M NaCl, but the only salt you have is in a 1.0 M solution. Describe how you prepare the required solution?           How do you prepare 100 cm3 of 0.1 M CoCl2 from a 0.52 M solution of CoCl2?           How many cubic centimeters of 0.69 M Ba(NO3)2 are needed to prepare 200 ml of 0.25 M solution?           Given a stock solution of 2 M NH4Br, describe the preparation of 500 ml of 0.15 M NH4Br solution.