1. Welcome to Chemistry II – Week IX
Evening Scholars
Mr. Treothe Bullock – Instructor
 Chapter 8 exam
 Chemical Equations and
Reactions
 Questions
 Exam
 Review
 Science in the News
 Our Staff here at Benson
and connections with Big
Oil & Corruption in Africa
 Final Project
 Sample Project
 Stoichiometry Lab
continued
 Complete Prelab
 Lab
 Post Lab write up
 Absolute Zero

2. Chapter 8 Test Answers 1-20
2 points each
 1. b 2. a 3. b 4. d
 5. a 6. b 7. d 8. a
 9. coefficient
 10. liquid
 11. reversible reaction
 12. A + X  AX
 13. AX +  A + X
 14. A + BX  AX + B
 15. AX + BY  AY +
BX
 16. metal hydroxides
 17. combustion
reaction
 18. electrolysis
 19. activity series
 20. chemical equation

3. Chapter 8 Test Answers 21-32
2 points each
 21. conservation of mass
 22. gaseous
 23. heated
 24. A word equation and a
formula equation are both
qualitative. Although they both
show the reactants and
products of a chemical
reaction, they give no
information about amounts of
reactants or products. A
chemical equation, however,
does show the relative
amounts of the reactants and
products in a chemical
equation.
 25. Three indication of a
chemical reaction are the
radiation of heat and light, the
production of a gas, and the
formation of a precipitate.
 26. zinc sulfide +oxygen 
zinc oxide + sulfur dioxide
 27. sodium iodide + chlorine
 sodium chloride + iodine
 28. Mg + O 2 MgO
 29. CaCO3  CaO + CO2
 30. decomposition reaction
 31. single replacement
reaction
 32. synthesis reaction

4. Chapter 8 Test Answers 33-40
2 points each
 33. double
replacement reaction
 34. CuCl2 + 2AgNO3
2AgCl+ Cu(NO3)2
 35. 2PbO 2  2PbO +
O 2
 36. Zn(OH) 2
2CH3COOH 
Zn(CH3COO)2 + 2H2O
 37. Mg (s) + 2H 2O (l)
 Mg(OH) 2(aq) +H2(g)
 38.no reaction
 39. Cl2(g) + MgBr2(aq)
MgCl2(aq) + Br2(g)
 40. Zn (s) + 2HCl (aq) 
H2(g) +ZnCl2(aq)

5. Chapter 8 Test Answers 41-44
2 points each
 41. no reaction
 42. 2Ni (s) + CuCl2 (aq)  2NiCl (aq) + Cu(s)
 43. no reaction
 44. Mg (s) + Co(NO3)2(aq) Mg(NO3)2(aq) + Co (s)

6. Chapter 8 Test
 2 points each 44
problems
 88 points possible
 80 = 100%
 72+ A
 64+ B
 56+ C
 48+ D
 Recovery required on
all scores below a 56

8. Tutorial Extra Credit – 15 points
 I. Prepare questions you have for tutor – a
minimum of 1 question from each of the 3
levels.
 II. Take at a minimum of 1 page of notes
from tutorial session.
 III. Have a signature from the tutor
confirming your work with them.

9. Test Recovery
If you scored under 90% and would like to improve your grade
follow the steps below. 89% is the highest grade allowed on
recovered tests. ½ Credit is given for all questions corrected as
instructed.
 I. State what your
mistaken question and
answer were.
 II. Explain the thinking
error that caused you to
miss the question.
 III. State the correct
answer.
 IV. Justify your answer
with a reference in the
text. Show any work
necessary to solve the
problem.

10. Test Recovery
If you scored under 90% and would like to improve your grade
follow the steps below. 89% is the highest grade allowed on
recovered tests. ½ Credit is given for all questions corrected as
instructed.
 I. State what your
mistaken question and
answer were.
 II. Explain the thinking
error that caused you to
miss the question.
 III. State the correct
answer.
 IV. Justify your answer
with a reference in the
text. Show any work
necessary to solve the
problem.