A solution contains the ions Ag, Pb2+, and Ni2+. Dilute solutions of NaCI, Na2SO4, and Na S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order? a. NaCl, Na2S, Na2SO4 b.NaCl, Na2SO4, Na2s c. NazS, NaCl, Na2SO4 d. Na2SO4, Na2S, NaCl e. Na2SO4, NaCI, Na2s
