1. Define the following terms: a. Decantation: b. Centrifugation: c. Supernatant: d. Precipitate: 2. What reagent(s) can be used to confirm Ag+, Pb2+, and Hg22+ ions? 3. List all the solid precipitates that you encounter and their colors. 4. What is the precipitating reagent for the silver ion in step 1? Would a solution of NaCl work as well? 5. What was your assigned unknown color? Could you make an educated guess on what ions may be present based on its initial color? 6. 6M HCl is added to a solution of silver, copper, and iron cations. A white precipitate forms. Predict which ions are present. Explain.