Question

Problem 9.19 Aqueous ammonia is commercially available at a concentration of 16.0 M.

Part A How much of the concentrated solution would you use to prepare 400.0 mL of a 1.70 M solution?

Answer 1

Before dilution                                                           after dilution

M1 = 16M                                                               M2 = 1.7M

V1    =                                                                        V2 = 400ml

           M1V1   = M2V2

           V1       = M2V2/M1

                      =1.7*400/16 = 42.5ml >>>> answer