Chemistry Review Ch 1 & 3 and SafetyName ______Period ____

A. Study the elements and symbols list again B. Know your MSDS and your NFPA Diamond information

C. Review the safety contract and any notes you took about safety. Also, p 16 in text.

D. What is thefirst thing you should do when there is an accident?

E. How should you mix acid and water? How do you clean up an acid spill? What is the procedure for heating liquids in a test tube?

F. Ch 1 info:

1. Chemistry is the study of ______

2. What is a hypothesis?______

3. How can you test it? ______

4. Are these good (testable) hypotheses, and why or why not:

“ When a dog wags its tail its because its happy ” ______

“ Drinking 48 oz of water in the 6 hours before a race can improve your time.” ______

5. A biologist is studying how earthworms behave in response to moisture. Group 1 receives .5 inches of moisture a day, but group 2 receives no moisture. Both groups are checked once in the morning and once in the aftertoon, everyday, for 3 weeks. Both groups receive the same amount of food, light and are kept at 30◦C.

  1. What is the independent variable?
  2. What is the dependent variable?
  3. What is the constant(s)?
  4. What is the control?

6. What is the difference between mass and weight? ______

7. Answer the Q’s on p 23

1) ______2) ______3) ______4) ______5) ______6) ______7) ______

G. Ch 3 Info

8. What is matter? ______

9. Give an example of something that is NOT matter ______

10. Define these terms and be able to label a list of substances as one of these:

element ______

compound ______

heterogeneous mixture ______

solution (homogen. mix) ______

11. How do physical properties differ from chemical properties? ______

12. List 3 physical properties of an iron nail ______

13. List a chemical property of an iron nail ______

14. How do physical changes differ from chemical changes? ______

15. Classify these as: P physical change or C chemical change

a. grating cheese ____ b. baking a muffin ____ c. roasting a marshmallow ____ d. icicle melting ____

16. List 5 possible indicators that a chemical reaction is taking place:______

17. Apply the Law of Conservation of Mass to the reactions below:

A. 25g methane (natural gas) combines with an unknown amount of oxygen to produce 52g carbon dioxide and 23g water vapor CH4 + O2  CO2 + H2O How much oxygen was used? ______

B. If the external tank of the space shuttle contained about 80,122 kg of liquid

hydrogen and this reacted completely with the 640,978 kg of liquid oxygen (in another section

of the tank) upon lift off, how much water vapor was produced?

18.Differentiate between qualitative and quantitative and give an example of each.

19.Mark the following as physical property (P), chemical property (C), physical change (PC) or chemical change (CC).water boils at 100◦C

  1. silver earrings tarnish
  2. combines easily with oxygen
  3. a headlight breaks when a student crashes a car
  4. chopping wood
  5. copper has a density of 8.92 g/cm3
  6. rain turns to snow on a cold day

20.Mark the following as homogeneous (HM) or heterogeneous (HT):

  1. blueberry muffin
  2. the U.S. Mint’s golden dollar coin

m.freshly squeezed orange juice with pulp and ice cubes