Chemical Reaction Sample Essays - Laboratory Equipment, Fire

Chemical Reaction Sample I Purpose: Observe chemical reactions and ID reactants and products of the reactions. Classify the reactions and write balanced Equations. II Theoretical Background: A chemical reaction is a what happens to components that causes a physical change. III Hypothesis: You can determine a chemical rxn by the physical change that takes place. IV (A) Equipment: Burner, wood splints, crucible tongs, microspatula, test tubes 7, test tube holder, test tube rack, sandpaper, evaporating dish, safety goggles, lab apron or coat. (B) Material: Zn, Cu, Mg, CuCO3, HCl, CuSO4, Zn(C2H3O2)2, Na3PO4,Na2SO3. V Procedure: 1. Use Sandpaper to clean the Cu. 2. Hold the Cu with the crucible tongs in the hotest part of the flame for about 2 minutes. Note the change in the Cu. 3. Put an evaporating dish near the base of the burner, and with crucible tongs put a piece of Mg in the flame and do not look at the flame. 4. Place 2 heaping microspatulas of CuCO3 in a test tube. note appearance. 5. Put test tube over the flame for 3 minutes and CO2 will now be present. 6. Put HCl and Zn in a test tube. Note changes. 7. Hold a test tube over the test tube with the HCl and the Zn. After thirty seconds put a burning wood splint in the test tube, a pop will indicate the presence of hydrogen gas. 8. Add about 5ml of CuSO4 in a clean new test tube. Put a piece of Zn in the solution . Note appearance of solution before and after Zn is in the tube. 9. Add 2ml of (Zn(C2H3O2)2) to a new test tube. Then add about 2ml of Na2PO3 to the test tube. Observe Changes. 10. Add about 5ml of Na2SO3 to a new test tube. Then add about 1ml of 6 M HCl. Smell, but not directly. VI Observations: On step two the copper turned black when in the flame. After the Mg would flared in the fire, the Mg turned to ashes. The CuCO3 was a white powder, and after it was in the flame CO2 was present and the CuCO3 turned black. the Zn and HCl started to bubble and their was a pop indicating Hydrogen gas. The Zinc turned black and the clear CuSO4 became green. The (Zn(C2H3O2)2), and the Na2PO3 became mirky white. In closing I could not Smell the Na2SO3, and the HCl. VIII Chemical Reaction: Their were many Chemical Rxn in this lab and are stated in the observations.