Honors Chemistry Chapter 2 Success Sheet

This success sheet is filled with questions and prompts that will guide you as you prepare for the Chapter 2 test. Write your answers to each question on a separate sheet of paper.
Chapter 2 – Activity 1

1. What is a pure substance?
2. Explain the difference between an element and a compound.
3. How can a mixture of salt, sand, and iron filings be separated?
4. What kind of separation is needed to change a compound into its elements?
5. What do the subscripts mean in a chemical formula?

Chapter 2 – Activity 2
6. Explain what happens to the energy of particles as a substance is heated form a solid to a liquid to a gas.
7. Explain what happens to the temperature of particles as a substance is heated from solid to liquid to gas.
8. What happens to the volume of a gas as it is heated?
9. Explain why dry ice sublimates at room temperature. What is the identity of the white vapor that is observed?
10. Draw a heating curve for water and label the following: solid, liquid, gas (vapor), melting, freezing, vaporization, condensation.
11. Explain sublimation and deposition.

Chapter 2 – Activity 3
12. What is a solution? Name at least 3 properties of a solution.
13. What is a suspension? Name at least 3 properties of a solution.
14. What is a colloid? Name at least 3 properties of a solution.
15. How can a suspension be separated?
16. Give an example of a solution, a suspension, and a colloid.
17. What is the Tyndall Effect?
18. Explain why the Tyndall Effect occurs in colloids but not in solutions or suspensions.

Chapter 2 – Activity 5
19. What is density?
20. A compound has a density of 2.1 g/mL. Would this sink or float in water? Explain.

21. What would be the density of a substance if 15 g of the substance has a volume of 20 mL?
22. A metal has a volume of 30 mL and a density of 2.7 g/mL. What is its mass?
23. What is the volume of 30 g of ethanol (d=0.9 g/mL)?
24. What is the mass of 25 g of copper (d = 8.90 g/mL)?
25. How many significant figures are in the number 0.00050 mg? Explain.
26. How many significant figures are in the number 10,000 m? Explain.
27. Joe has $140.25 in his savings account. Round this to 3 significant figures.
28. Add the following measurements and report your answer to the correct number of significant figures: 10 mm, 10.1 mm, 11.2 mm, 13.45 mm.
29. Calculate the answer to the following problem. Report your answer to the correct number of significant figures: (15.6 mg x 12.001 mg)/(3.413 mg x 11.1 mg)

Chapter 2 – Activity 6
30. What is a metal? Where are metals located on the periodic table?
31. What is a nonmetal? Where are nonmetals located on the periodic table?
32. What is a metalloid? Where are metalloids located on the periodic table?
33. List 5 properties of metals.
34. List 5 properties of nonmetals.
35. What is an alloy?

Chapter 2 – Activity 8
36. Explain how colors are produced during a flame test.
37. Which of the following compounds would produce the same color in a flame test: CaCl2, CoCl2, Cu(NO3)2, Ca(NO3)2. Explain your answer.