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 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.

IX

References:

The Paper given during the class.

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Conclusions: