Download Review Rxn - cloudfront.net

Review Rxn
True/False
Indicate whether the statement is true or false.
____
1. A cation is a negatively charged atom.
____
2. In an ionic bond, two cations can bond together to form a compound.
____
3. When an atom gains electrons, it becomes positively charged.
____
4. Phosphide is the name of the anion formed when phosphorus gains three electrons.
____
5. In covalent compounds, atoms become chemically stable by sharing their valence electrons.
____
6. Noble gases are generally non-reactive because they already have a complete valence shell.
____
7. In a chemical reaction, the products are found on the left side of the arrow.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
8. Which is the charge that results when oxygen becomes an ion?
a. +2
c. +3
b. -3
d. -2
____
9. How many single covalent bonds are elements in Column F likely to form?
a. 1
b. 2
c. 3
d. 4
____ 10. How many single covalent bonds can halogens form?
a. 1
c. 3
b. 2
d. 4
____ 11. In the compound PCl3, how many total valence electrons are present?
a. 4
c. 24
b. 8
d. 26
____ 12. Which is the correct formula for the compound dinitrogen monoxide?
a. NO2
c. N2O1
b. (NO)2
d. N2O
____ 13. Which is the formula for the compound sulfur hexachloride?
a. S6Cl
c. SCl5
b. SCl6
d. S2Cl3
____ 14. How many bond pairs of electrons exist in a molecule of ammonia?
a. 1
c. 8
b. 4
d. 10
____ 15. In this equation, which are the reactant(s)?
a. A only
b. C only
c. A + B
d. B only
____ 16. In a chemical equation, (aq) after one of the substances means that it is which of these?
a. a solid formed from two ionic substances
b. released as gas
c. dissolved in water
d. produced from nothing
____ 17. How many total atoms are in 3Na2SO4?
a. 21
b. 10
c. 24
d. 18
____ 18. Which type of reaction is Al + O2  Al2O3?
a. synthesis
c. single replacement
b. decomposition
d. combustion
____ 19. Which types of reactions are essentially opposites of one another?
a. combustion and synthesis
b. single replacement and double replacement
c. synthesis and single replacement
d. synthesis and decomposition
____ 20. What are the correct coefficients when this equation is balanced? Sb + O2  Sb4O6
a. 1, 2, 10
c. 4, 3, 1
b. 4, 6, 1
d. 10, 5, 1
____ 21. What are the correct coefficients when this chemical equation is balanced?
P4 + O2  P2O5
a. 4, 2, 7
c. 2, 5, 4
b. 1, 1, 1
d. 1, 5, 2
____ 22. Identify the type of chemical reaction demonstrated by this equation:
KClO3  KCl + O2
a. decomposition
c. combustion
b. synthesis
d. single replacement
____ 23. What type of reaction takes place when fluorine reacts with sodium bromide?
a. Single-replacement
c. Combination
b. Double-replacement
d. Decomposition
Short Answer
24. Infer three pieces of evidence that a chemical reaction is taking place in the pictures shown.
25. Explain what is wrong with this chemical equation.
2NaCl(s) = 2Na(s) + Cl2(g)
26. Add the correct coefficients to properly balance this equation.
27. Add the correct coefficients to properly balance this equation.
28. Define reactants in a chemical reaction.
29. Define products in a chemical reaction.
Completion
Complete each statement.
30. A chemical reaction in which two or more substances react to produce a single product is called a(n)
____________________ reaction.
Review Rxn
Answer Section
TRUE/FALSE
1.
2.
3.
4.
5.
6.
7.
F
F
F
T
T
T
F
MULTIPLE CHOICE
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
D
B
A
D
D
B
B
C
C
A
A
D
C
D
A
A
SHORT ANSWER
24. Light is given off. Heat is given off. The reactants (wood) are changed into a new substance (ash). The
reaction is not reversible; ash cannot be turned back into wood. Gas is released. The appearance of the
substances changes.
25. A reaction is a chemical process where the reactants are turned into or become the products. This is shown
with an arrow rather than an equal sign. An equal sign would signify that the reactants and products are
equivalent, when in fact they are different chemical substances.
26.
27.
28. The starting substances of a chemical reaction are called reactants.
29. The substances formed in a chemical reaction are called products.
COMPLETION
30. synthesis