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, micro spatula, test tubes 7, test tube holder, test tube rack, sandpaper, evaporating dish, safety goggles, lab apron or coat. (B) Material: Zn, Cu, Mg, CuCO 3, HCl, CuSO 4, Zn (C 2 H 3 O 2) 2, Na 3 PO 4, Na 2 SO 3. V Procedure: 1. Use Sandpaper to clean the Cu.
2. Hold the Cu with the crucible tongs in the honest 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 apiece of Mg in the flame and do not look at the flame. 4. Place 2 heaping micro spatulas of CuCO 3 in a test tube. note appearance. 5. Put test tube over the flame for 3 minutes and CO 2 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 5 ml of CuSO 4 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 2 ml of (Zn (C 2 H 3 O 2) 2) to a new test tube. Then add about 2 ml of Na 2 PO 3 to the test tube. Observe Changes. 10. Add about 5 ml of Na 2 SO 3 to a new test tube. Then add about 1 ml 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 CuCO 3 was a white powder, and after it was in the flame CO 2 was present and the CuCO 3 turned black. the Zn and HC started to bubble and their was a pop indicating Hydrogen gas. The Zinc turned black and the clear CuSO 4 became green.
The (Zn (C 2 H 3 O 2) 2), and the Na 2 PO 3 became milky white. In closing I could not Smell the Na 2 SO 3, and the HCl. VIII Chemical Reaction: Their were many Chemical Rxn in this lab and are stated in the observations. IX References: The Paper given during the class. X Conclusions:.