Name: ________________________________________________ Date: ___________________ Block: _____________
Chemistry Study Guide
Target 1: I can determine the similarities in the chemical and physical properties of substances before and after
reactions.
1. What is a physical property?
2. What is a chemical property?
3. Label each of the following as either a physical (P) or chemical property (C).
a. ___________ Odor
b. ___________ Melting Point
c. ___________ Supports combustion
d. ___________ Density
e. ___________ Solubility (dissolves)
f. ___________ Malleability
g. ___________ Reacts with vinegar
h. ___________ Luster (Shiny or Dull)
i. ___________ Good conductor of electricity.
4. Give an example of a physical property that is not listed above. ___________________________________
5. Give one example of a chemical property that is not listed above. __________________________________
Target 2: I can determine whether a chemical reaction has occurred based on the substances properties.
6. What is the main difference between a chemical and physical reaction?
7. List at least five observations that you may observe during a chemical reaction.
a. ____________________________________
b. ____________________________________
c. ____________________________________
d. ____________________________________
e. ____________________________________
8. Complete the chart by determining whether a physical or chemical reaction has occurred in each scenario and
give evidence for your decision.
Scenario
Physical or Chemical
Evidence
Burning a marshmallow over
a campfire.
Sugar dissolves in water.
Water is boiled and begins
to evaporate.
An iron shovel begins to
rust.
Target 3: I can use a model to explain that mass is conserved in a chemical reaction.
9. What does a chemical equation represent?
10. What does the conservation of mass (matter) mean?
11. Draw a model of the following chemical equation: 2H₂ + O₂
2H₂0
12. Label the products and reactants in the chemical formula below?
6CO₂ + 12H₂O
C₆H₁₂O₆ + 6O₂ + 6H₂O
13. Use the formula from #12 to complete the chart with the number of atoms found on each side of the equation.
Atom
Carbon (C)
Oxygen (O)
Hydrogen (H)
Reactants Side
Products Side
14. In a chemical equation, you have 3 atoms of chlorine in the reactants. How many atoms of chlorine would you
have in the products? _______________________
15. Katie determined the mass of her candy bar to be 27g. She took it out of the wrapper and found the mass of
the wrapper and the candy bar separately. If the mass of the candy bar was 23g, what would the mass of the
wrapper be? ______________________
16. Assuming that magnesium and oxygen will react completely with one another, predict the mass of magnesium
oxide that will be produced when 17 g of magnesium reacts with 5.6 g of oxygen.
Target 4: I can determine whether a chemical reaction is releasing or absorbing energy (thermal).
17. Label each of the following pictures below as either endothermic or exothermic and draw arrows to show how
heat energy is either transferred into the object or out of the object.
____________________
____________________
18. Label each of the following reactions as either exothermic or endothermic.
a. When two chemicals mix their temperature rises: ____________________
b. A solid burns brightly and releases heat, light and sound: _____________________
c. When two chemicals are mixed their temperature drops: _____________________
d. Two chemicals will only react if you heat them continually: ______________________
e. Plants take in light energy for photosynthesis: _______________________
19. During an endothermic reaction heat energy _______________________ the system and the surroundings feel
________________________.
20. During an exothermic reaction heat energy _______________________ the system and the surroundings feel
________________________.
Target 5: I can design, test and modify a device that involves a chemical reaction that releases or absorbs energy.
21. Draw a sketch to show how a cold pack works.
22. Explain how a cold pack works.