CHEMICAL REACTIONS:Hydrochloric acid, open flames, matches, Copper Sulfate

Chemical Reactions!!!-We survived:)

HOMEWORK:
Monday- Get two dark copper pennies. Sprinkle some table salt on them. Drop about 5-6 drops of vinegar on the salt-covered pennies. Observe the pennies for about 20 minutes and then rinse them with water. How do the pennies look now?

Place one of the pennies in plastic wrap. Wrap the penny tightly to prevent its exposure to air. Set this penny aside. Place the other penny on a saucer. Add just enough water to the saucer so that the penny is not completely covered. Let this coin remain in the water overnight.

Tuesday- Observe the pennies. How do they compare? What caused the changes that you observed?

*ANSWER THE QUESTIONS THAT ARE BOLD AND UNDERLINED AND TURN IN FOR HOMEWORK


Wednesday- Study for test!!!

Thursday- Complete test:)

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CLASS RECAP:
Chemical reactions. Well we did it and we survived!! We brought out real chemicals and real flames -need I say more. I introduced the concept of chemical reactions and conservation of mass within a reaction. We then balanced a couple of reactions that we experimented on in class. The students were broken into 6 groups and went around the six lab stations:
1. The disappearing AL foil-using HCL acid
2. Extracting Copper from Copper Sulfate- Using Copper Sulfate, Al foil and salt
3. Exchanging Copper for Iron - Using Copper Sulfate and Iron nail
4. Creating Copper Oxide-Using a torch and a penny
5. Generation of Oxygen - Using hydrogen peroxide, yeast, and pre-lit wooden stick to watch it ignite from the Oxygen generated.
6. Converting Starch into Sugar - Using iodine, saliva and crackers

We will complete the experiments next week-Come prepared! Enjoy your weekend!
MRS. TYLER