Repeat with ~3 mL of nickel (Il) nitrate in each of the four small test tubes. Save the Ni(OH)2 precipitate for step 7 Dispose of all waste in the appropriate container" Reactants NaOH AgNO3 5. NaBr Na2CO Na2SO4 4 NH NO3 6 8 Pb(NO3)2 9 12 10 Ba(NO3)2 5 16 13 14 15 Ni(NO3)2 17 18 19 20 Place a couple of small pieces of calcium carbonate in to a small test tube. Add~3 mL of hydrochloric acid to the solid. Watch for a few minutes, then, record your observations in your carbon copy notebook. Using the saved Ni(OH)2 precipitate from step 5. Add ~-3 mL of hydrochloric acid to the solid. Gently shake the test tube. Record your observations in your carbon copy notebook. Using a clean dry test tube add ~3 mL of hydrochloric acid and 3 mL of sodium droxide. Record your observations in your carbon copy notebook. hy epeat with acetic acid and sodium hydroxide, then with hydrochloric acid and mmonia. "Dispose of all waste in the appropriate container
