Bobby and Jane dissolve 26.8 g of solid potassium iodide (KI) in water, then pour the solution into an excess of concentrated lead (ll) nitrate. Jane carefully filters the resulting yellow precipitate from the solution and dries the solid overnight. The following day, Bobby finds the mass of the precipitate (which he knows to be Pbl2) to be 34.8 g. What is the percent yield of Pbl2 in Bobby and Jane's reaction?

2. Carefully pour about 8 mL of 0.5 M potassium iodide solution into the first compartment of the Petri dish until the com-partment is one-third to one-half full. 3. Add 3 drops of phenolphthalein solution and stir to mix. 4. Connect the battery cap to the 9-V battery. Carefully attach a “pencil lead” electrode to each alligator clip lead.

Explanation:2. Carefully pour about 8 mL of 0.5 M potassium iodide solution into the first compartment of the Petri dish until the com-partment is one-third to one-half full. 3. Add 3 drops of phenolphthalein solution and stir to mix. 4. Connect the battery cap to the 9-V battery. Carefully attach a “pencil lead” electrode to each alligator clip lead.

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