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Types Of Chemical Rxn Essay Research Paper

Types Of Chemical Rxn Essay, Research Paper


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 tub

e 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.


IX


References:


The Paper given during the class.


X


Conclusions:

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