Friday, November 18, 2011

Chemical Reactions Lab

Name of Lab: Chemical Reactions

Guiding Question:
How do we know if a chemical reaction has occured?

Hypothesis:
I know because we can see the physical change, and latter we can see the difference in the chemical change.

Materials:
  1. Sodium Carbonate
  2. Calcium Chloride
  3. Hydrochloric Acid
  4. Copper Sulfate
  5. Aluminum Foil
  6. Zinc Pieces
  7. Baking Soda
  8. Vinegar (Acetic Acid)
  9. Magnesium Tablets
  10. Spatula
  11. Graduated Cylinders
  12. Stirrer
  13. Candles
  14. Goggles
  15. Beakers/Baby food Jar

Data Table:

Reactions

Observation after reaction

Predictions

Observations during reactions

Observation after reaction

Baking soda + Vinegar

No changes when nothing is added

It will fizz up and Overflow

Began to fizz, but barely came over the top

The liquid settled, and a lot less liquid

Sugar+ Heat

Normal without changes

It will melt and become sticky, and caramelized

It began melting and burning, and blackening up

Al burned, some of the suger was sticky, the aluminum foil was all burned and created Carbon

Copper Sulfate + Sodium

Nothing Abnormal

It will most likely fizz, and change color

Only began to change color and also changed shape.

It was blue, and the object was gooey

Zinc piece + HCL

Nothing different

It will change color

Bubbles started forming, and the zinc became darker.

Gave of hydrogen gas, plus the Zinc became black

Calcium Chloride + Sodium

Nothing Abnormal

It will change color

Turning into a witish mixture

Became whit

Copper Sulfate + aluminum

Nothing Abnormal

Change color

Began to change color and replace atoms

Became red

Starch + Iodine

Everything was normal

Change color

Began to change color

Becam Purple


Analysis Of Data:
My prediction was right for most of the Elements. Some of them began to fizz up which is a physical change such as baking soda and vinegar. Others turned into different colors such as Starch combined with Iodine, or Copper Sulfate combined with Aluminum. The products always changed after the chemical reaction ended, it either changed color or it still fizzed a little, but something was the same after the reaction ended the final result had a feature that the starting experiment also had This was that it was calm that it created a new "element." Some of the ways that my hypothesis was right was because of the fizzing and the color change, it also came to a melting point or began to burn, such as the Aluminum Foil and Sugar combined with heat.

Conclusion:
"How do we know if a chemical reaction has occurred?" I believe that I answered this perfectly, "By seeing the physical and chemical change" my hypothesis was correct every single experiment changed and as it was changing i was able to write down how it is changing, and I could only do that because I recognized the physical and chemical change.

Further Inquiry:
I think that this procedure was well done, but I would also change a few things such as putting more of an ingredient, or mix different compounds, but a question that I would certainly ask myself is "How does the amount of one element effect the final result?"

Thursday, November 17, 2011

Lab Outline

Name Of Lab: Elephant Toothpaste

Guiding Question: How will the physical and chemicle features change if a little more of a liquid is added?

Hypothesis: I believe that the more hydrogen peroxid there with be thicker foam, but if you add more potasium it will most likely be much longer.

Materials Used:
1. 50-100 of 30% hydrogen peroxide sulution.
2. Saturates potassium iodide (KI) solution
3. Detergent
4. Food coloring.