Prepare a chart for recording any observations as you test for the presence of cations in the solution. Set up and label 10 test tubes #1- #10 and place them in order in a test-tube rack. Wash and rinse all of glassware with distilled water. Prepare a hot-water bath in a 250 mL beaker by filling it up to 150 ml and bringing it to a boil. Obtain 2 ml of the solution you want to test and pour it into test tube 1. To test the solution for Pb2+ and Ag+ ions, add 8 drops of 6 M HCl solution to Test Tube 1 and stir the mixture. If a white precipitate forms, then Ag+ and/or Pb2+. Centrifuge the test tube and add one more drop of 6 M HCl. If more precipitate does form, continue adding HCl one drop at a time until the supernatant (the liquid) remains
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Centrifuge the test tube and transfer the supernatant to Test Tube 6. Add 10 drops of distilled water to Test Tube 2 and centrifuge it, then pour out the supernatant. Add 1 mL of water, 1 mL of 6 M H2SO4 solution, and 1 mL of 3% H2O2 solution into Test Tube 2 then place the test tube in a hot water bath until all of the precipitate dissolves, then transfer half of the solution to Test Tube 7. To test for Mn2+, add 1 mL of 6 M HNO3 and a very small scoop of solid sodium bismuthate, NaBiO3.to Test Tube 7. Stir and centrifuge it. If the supernatant liquid is a purple color, then Mn2+ ions are present.. CleanTest Tube 7 and Test Tube 2. To test for Cu2+, add 6 M NH3 one drop at a time to Test Tube 6 until it is basic, then add an extra 1 mL more of the 6 M NH3. Stir and Centrifuge the test tube, then transfer the supernatant to Test Tube8. If the liquid in Test Tube 8 is a blue color, then there are Cu2+ ions present. Clean Test Tube 8. Add 10 drops of distilled water to the precipitate in Test Tube 6 and add 6 M H2SO4 one drop at a time until the precipitate dissolves, then Transfer half of the solution to Test Tube 9. To test for Fe3+ add 5 drops of 0.1 M KSCN solution to Test Tube 6. If the liquid in the test tube turns a deep red color, then Fe3+ ions are
Centrifuge the test tube and transfer the supernatant to Test Tube 6. Add 10 drops of distilled water to Test Tube 2 and centrifuge it, then pour out the supernatant. Add 1 mL of water, 1 mL of 6 M H2SO4 solution, and 1 mL of 3% H2O2 solution into Test Tube 2 then place the test tube in a hot water bath until all of the precipitate dissolves, then transfer half of the solution to Test Tube 7. To test for Mn2+, add 1 mL of 6 M HNO3 and a very small scoop of solid sodium bismuthate, NaBiO3.to Test Tube 7. Stir and centrifuge it. If the supernatant liquid is a purple color, then Mn2+ ions are present.. CleanTest Tube 7 and Test Tube 2. To test for Cu2+, add 6 M NH3 one drop at a time to Test Tube 6 until it is basic, then add an extra 1 mL more of the 6 M NH3. Stir and Centrifuge the test tube, then transfer the supernatant to Test Tube8. If the liquid in Test Tube 8 is a blue color, then there are Cu2+ ions present. Clean Test Tube 8. Add 10 drops of distilled water to the precipitate in Test Tube 6 and add 6 M H2SO4 one drop at a time until the precipitate dissolves, then Transfer half of the solution to Test Tube 9. To test for Fe3+ add 5 drops of 0.1 M KSCN solution to Test Tube 6. If the liquid in the test tube turns a deep red color, then Fe3+ ions are