1. Science Planner 5/31/17
WALT: prepare for a chemical reaction lab. WU: None
CW: Vocab
Pre Lab “Signs of Chemical Reactions”

2. Announcements:

3. Vocabulary:
Chemical Reactions – involve two main kinds of changes that you can observe. a. formation of new substances b. changes in energy Precipitate – solid that forms from solution during a chemical reaction. Endothermic Reaction – is a reaction in which energy is absorbed. Exothermic Reaction – is a reaction that releases energy in the form of heat.

4. Pre Lab Title: Signs of Chemical Reactions
Hypothesis: Different chemicals will produce different kinds of reactions.
Materials per Group:
4 small plastic cups 8. Candle
Plastic spoons 9. Sugar
Tongs Clay
Matches Sodium carbonate (powdered form)
Graduated cylinder 12. Aluminum foil (10 cm2)
Dilute hydrochloric 13. Copper Sulfate Solution acid
Sodium carbonate solution

5. Data Table:
Data Table
Reaction Observations Predictions Observations Observations before reaction during reaction after reaction
Sodium carbonate Powder HCL acid
Sugar + Heat
Copper sulfate +
Sodium carbonate solution