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.

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j