Lab

Title of the Lab: Where’s the Evidence

Investigation Question: What are some signs a chemical (change) or reaction has occurred?

Hypothesis: I think that the chemicals will either react by changing color, bubbling or exploding.

Materials:

-          Na2 CO3 – Sodium Carbonate

-          Ca Cl2 – Calcium Chloride

-          HCI – Hydrochloric Acid

-          Cu SO4 – Copper Sulfate (Acid)

-          Aluminum Foil

-          Zinc Piece

-          Baking Soda

-          Vinegar ( Acetic Acid)

-          Magnesium tablets

-          Spatula

-          Graduated Cylinder

-          Stirrer

-          Candle

-          Goggles

         - Beakers/ Baby Food Jars

Reactions	Observations Before Reaction	Predictions	Observations During Reactions	Observations After Reaction
Baking Soda (soda bicar bonate) + vinegar	-          White powder -          Clear liquid	-          Will fizzle	The more baking soda added the more it bubbled	Slowly dies down to a bubbly liquid
Sugar + Heat
Copper Sulfate + Sodium Carbonate Solution	-          Blue liquid -          Clear liquid	-          Will change color	Smokey aqua blue liquid	The blue separates to form a clear liquid underneath
Zinc Piece + HCI	-Silver, grey medalish -          Clear liquid	-          Will bubble -          Change color	Color is burning off, making milky white liquid	Changed color to black, with pieces of zinc burning off
Calcium Chloride + Sodium Carbonate	-          2 clear liquids	-          Will bubble	Turns a milky white	Milky white liquid settles to the bottom
Copper Sulfate + aluminum foil piece	-          Shiny foil -          Blue liquid	-          Will burn or change color	Stayed afloat	Turns a copper- red and liquid turns clear

Conclusion:  My hypothesis was correct. Every experiment bubbled, changed color, or burned/ exploded. If a substance would keep bubbling or keep burning it would mean it is trying to change. For example, when copper sulfate has an aluminum piece in it I can change color for days. When a reaction came to a change it would mean that all its energy was gone and it could no longer react.

Further Inquiry: I think that this would be better if we measured out everything we added to make a clearer result.