Post-Lab Questions 1. Look up the Activity Series of Metals. For which set of test tubes above does this series apply, and how does it help explain the results you observed? 2. Look up what a geologist would refer to as an "acid test." For which set of test tubes above does this "test" apply, and how does it help explain the results you observed? Clearly explain why geologists often carry a bottle of hydrochloric acid with them when they are in the field. 3. A student was asked to identify a white powder that must be either sodium chloride or sodium acetate. To identify the powder, the student first dissolved some of the powder in water. Then, a few drops of silver nitrate solution were added, and the student noted that the solution became white and cloudy. a. Help the student identify the unknown powder, and explain your reasoning. b. Why was it necessary for the student to dissolve the powder first, before adding drops of silver nitrate solution