Chemical Reaction Lab

Chemical Reactions Lab

Problem:  The signs of a chemical reaction that has taken place is when the color changes, gas is released, change in temperature, and Precipitate.

Materials:  

·         4 small plastic cups

·         Eyedroppers

·         Test tubes

·         2 plastic spoons

·         Tongs

·         Matches

·         Sodium carbonate (powder)

·         Graduated cylinder, 10 mL

·         Aluminum foil, about 10-cm square

·         Dilute hydrochloric acid in a dropper bottle

·         Copper sulfate solution

·         Sodium carbonate solution

Procedure:

           Baking soda + vinegar: Add a teaspoon of backing soda and then about 8 drops of vinegar in a test tube and record your results.

Copper sulfate +Sodium carbonate solution: Add a teaspoon of Copper sulfate into a test tube and 8 drops or sodium carbonate solution and record your results.

Zinc piece + HCl: Add one piece of Zinc ( size of a small pebble ) into a test tube then add 8 drops of HCl and record your results.

Calcium Chloride + Sodium Carbonate: Add a teaspoon of sodium carbonate into a test tube and then add 8 drops of Calcium Chloride and record your results.

Copper sulfate + Aluminum foil piece: Add 20 drops of copper sulfate and then drop in the Aluminum foil piece and record your results. You may have to wait awhile before you see change.

Starch and Iodine: Add a teaspoon of starch and then add 8 drops of Iodine and record your results.

Reaction	Observation before reaction	Predictions	Observation during reaction	Observation after reaction
Backing soda (soda carbonate) + Vinegar	Its in powder form	It will bubble	It fizzed (released gas)	It dissolved and it settled
Sugar + Heat	N/A	N/A	N/A	N/A
Copper Sulfate + Sodium carbonate solution	It is baking soda powder and liquid	BOOM	It fizzed (released gas)	It precipitate, settled, and dissolved
Zinc Piece + HCl	Pebble of Zinc and liquid acid	Bubbles	fizzes slowly	Aluminum foil turned into copper (red color)
Calcium Chloride + Sodium Carbonate	Separate substances	BOOM	fogginess	precipitate
Copper sulfate + Aluminum foil piece	Foil and liquid	POOF	Blue color fading and bubbles surround foil	Blue color fading/ and turned black
Starch    + Iodine	liquid on top, powder on bottom	BOOM	Started dissolving together	Dissolved and when H2O was added it turned purple

Analyze and Conclude:

1. The results of the reactions were slightly different from the predictions we had because a lot of them predictions were things such as, "It will explode" and a lot of the things did not explode.
2. We new the reactions was over because the fizzing had subsided and the sodium carbonate had dissolved into the vinegar and had become a new solution.
3. The product was a liquid and we knew because we saw the end product.
4. The end result in part 3 was a liquid with precipitation which were small pieces of solid so it was a mixture with solid particles.
5. We used sight to to tell the outcome of the reaction We could use instruments to maybe tell the different properties of the end result of the reactions.