6. For individual solutions of the cations Ag", Ba, Mg, and Cu, the following experimental observations were collected: NH,(aq) HC(aq) H,SO(aq) Ag* Ba Mg+ Cu No change White ppt No change No change "Exumple. When an aqueous solution of hydrochlorie acid is added to a solution costaining Ag, a white precipitate (pp) forms No change No change White ppt White ppt" No change No change No change Blue pp/deep blue soln with excess From these experimental observations, a. identify a reagent that distinguishes the chemical properties of Ag and Mg. What is the distinguishing observation? b. identify a reagent that distinguishes the chemical properties of HCI and H,So, What is the distinguishing observation? c. identify a reagent that distinguishes the chemical properties of Ba* and Cu. What is the distinguishing observa- tion? "d. identify a reagent that distinguishes the chemical properties of Cu and Mg". What is the distinguishing obser- vation?