In: Chemistry
a. What sign of a positive chemical reaction will be observed in
the "Reactions of Known Solutions" tests?
b. What three test reagents will be used? Write their correct
chemical formulas
The purpose of this experiment was to study the reactions of elements/ions when exposed to other known solutions. As, stated before we can identify elements in the same group or family because they have similar chemical reactions. Barium, Calcium and Strontium showed a positive reaction to precipitation when exposed to ammonium carbonate and ammonium sulfate; Lithium, Potassium and Sodium had no reaction. All six elements/ions (Ba, Ca, Li, K, Na,Sr) had a negative reaction when exposed to ammonium phosphate. The family or group that showed a positive precipitation test was the alkaline earth metals.