Reactions of Copper and Percent Yield (A Copper Cycle) Filter funnel Filter paper Distilled water & wash bottle Hot hand

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Reactions Of Copper And Percent Yield A Copper Cycle Filter Funnel Filter Paper Distilled Water Wash Bottle Hot Hand 1 (115.05 KiB) Viewed 48 times

Reactions of Copper and Percent Yield (A Copper Cycle) Filter funnel Filter paper Distilled water & wash bottle Hot hand 6.0 M Sulfuric acid Zinc metal (mossy or granular) Iron ring and stand Clay triangle Procedure: 1. Mass approximately 0.50 g of copper wire and place it in a 250 mL beaker. Record the exact mass of copper (your starting mass is 0.497 g of copper) you have as a starting material. 2. Add 5 mL of concentrated nitric acid to the beaker in the fume hood. Record your observations. 3. After the copper is completely reacted, add 100 mL of distilled water to the beaker, then add 30. mL of 3.0 M NaOH solution to the solution in your beaker. Record your observations. 4. Carefully stir and heat the mixture just to the boiling point. Stir continuously as you heat. Describe the reaction. 5. Allow the precipitate to settle, then decant the supernatant liquid. Add about 200 mL of hot distilled water, stir, and then allow the solid to settle again. Decant once more. 6. Add 15 mL of 6.0 M H₂SO4. Stir. Describe the reaction. 7. Do this step in the fume hood. Measure about 1.5 g of zinc metal. Add the zinc metal to the solution in the beaker and stir until the liquid is clear. 8. Fold and mass a piece of dry filter paper and record the mass. When the precipitate has settled, filter the mixture. Wash the solid with two 10. mL portions and allow the copper to air dry. 9. Find the mass of the copper you have recovered in this reaction. Mass of copper + filter paper 0.831g 0.543 g Mass of filter paper Mass of copper recovered 10. Calculate the percentage yield for the reaction. (Show formula and work.) 11.. Write the reactions for each step in the copper cycle in words. • Classify the reactions as single displacement, double displacement, synthesis, or decomposition if the reaction fits one of these patterns. Describe the appearance of the copper compounds formed at each step. 12. Describe what conditions may have caused your mass of copper recovered to be different from the theoretical amount.