CHEM 121 Lab 4 Chemical Reactions SPRING 2024 Portage learning

Title: Chemical Reactions Purpose: Observe different kinds of chemical reactions and the results. Six tyles of simple chemical reactions and reversible reactions Procedure: 1. Combine AgNO3 (silver nitrate) and HCl (hydrochloric acid) in test tube. White solid forms - AgCl (silver chloride) 2. Put stopper on and invert to mix. Double displacement reaction. 3. Combine KI and Pb(NO3)2 - creates a yellow liquid (used to be used in paints - caused lead poisoning) 4. Acid/Base Double displacement reaction. Take temperature of solutions separately. Combine NaOH and HCl in test tubes. 5. HCl and NaHCO3 (sodium bicarbonate) combined in test tube. Observe 6. Add Barium hydroxide to beaker and add ammonium nitrate to beaker. Add a little water to help the chemicals react. Use a litmus test to check for presence of ammonia which is a base 7. In test tube containing HCl , add solid zinc metal. Take temperature of solution with temperature probe, 8. Add Cu to Silver nitrate in beaker on active stir plate. 9. Strike a match and light a candle. Blow match out. 10. Add hydrogen peroxide to test tube and add manganese dioxide. 11. Add iodine to beaker on active stir plate. Add solid zinc. Leave for 20 minutes to react. 12. Heat copper in flame. 13. Add reduced methylene blue to Erlhenmeyer flask and shake. Let rest. Shake again. Repeat. Observe changes.