Download AP Chemistry Summer Packet More Chapter Two and Chapter

AP Chemistry Summer Packet
More Chapter Two and Chapter Three: Molecules, ions, and Compounds
Assignment:
Read chapter 3.
Homework: End of chapter questions page 119
You should be able to define Key Terms listed on page 115/116
You should also be able to apply Key Equations
HW: page 119 41,67,73,75,89,
Random Notes:
The net charge on an ionic compound is equal to zero.
Metals lose & non-metals gain electrons.
Metals in group 1 lose 1
metals in group 2 lose 2
percent composition = (part/whole) x 100
molecular formula = ( empirical formula )n
n= ( mass molecular formula/ mass empirical formula)
AP Chemistry
Chapter Three: Molecules, Ions, and Compounds
Name________________________________________________
Date:_September 6?_________________
Partners:______________________________________________________
Again, please continue to place your answers on the same scantron sheet that
you used for chapters 1 & 2. Thanks. Also, work with someone else, but each of
you must individually submit your own answer sheet. It is wise to understand the
questions and not just copy answers. I also encourage you to answer on the
actual test and keep it for yourself to review.
60.The smallest identifiable unit into which a pure substance can be divided into and
still retain the properties of the substance is called a/an
a. atom
b. molecule
c. ion
d. none of the above
61. In the molecule C3H8 there are how many carbon atoms?
a. 11
b. 3
c. 8
d. 0
62.
How many hydrogen atoms are in C3H6(OH)2
a. 6
b. 7
c. 8
d. 12
63. Ionic compounds are formed between metals and a non-metals. WHich of the
following is not an ionic compound?
a. NaCl
b. LiF
c. MgO
d. H2O
e. All of the above
64. Atoms which give away electron/s when forming ionic bonds are referred to as
a. Donors
b. anions
c. cations
d. Takers
65. What type of ions do metals form?
a. cations
b. anions
66. Atoms that gain electron/s are referred to as
a. anions
b. cations
c. takers
d. givers
e. none of the above
67. Ions which are composed of multiple atoms are referred to as
a. cluster ions
b. multi-atomic ions
c. polyatomic ions
d. non of the above
68. The following equation represents the formation of a/an:
Li --> 1e- + Li+
a. cation
b. anion
c. polyatomic ion
d. chemical reaction
69. When oxygen forms an ion, it will become
a. 1+
b. 1c. 2+
d. 270. What is the charge on a magnesium ion?
a. +1
b. -1
c. +2
d. -2
e. non of the above
71. What is the charge on an argon ion?
a. +1
b. -1
c. +2
d. -2
e. Are you crazy? It is a noble gas; non of the above.
72. What is the charge on a transition metal when it forms an ion?
a. +1
b. -1
c. +2
d. -2
e. It depends on the element. Many transition metals have multiple oxidation states;
the oxidation state is dependent on what it is bonding with.
73. When calcium and oxygen and, an ionic compound will be formed. Calcium, a
metal, will lose electrons, and oxygen will gain electrons. The two elements will
then combine in a ratio that will form a neutral molecule. This molecule will be
a. CaO
b. Ca2O
c. CaO2
d. none of the above
74. An example of a polyatomic ion is the phosphate ion, PO4 3-. The phosphate ion can
form an ionic compound by bonding with calcium. The formula for this compound
would be
a.
b.
c.
d.
e.
Ca PO4
Ca2 PO4
Ca (PO4)2
Ca3(PO4)2
Ca2(PO4)3
75. The compound MgCl2
a. Magnesium dichloride
b. Monomagnesium dichlorine
c. Monomagnesium dichlorate
d. Magnesium chloride
e. None of the above
76. When a substance that has a positive charge is brought near a substance that has a
negative charge, a force of attraction occurs between them. WHen two substances
with the same sign of charge are brought near each other, a repulsive force occurs.
These forces are electrostatic in nature. In chemistry, the force of attraction or
repulsion is given by
a. The electrostatic Law
b. The Chrystaline Law
c. Coulomb’s Law
d. Dalton’s Law
77. In the solid state, ionic compounds arrange themselves in a manner which
maximizes attractive forces and minimizes repulsive forces. This yields a structure
with the minimum energy. This structure is referred to as the
a. Minimum energy structure
b. Ab-initio solid state structure
c. crystal-lattice structure ( a/k/a lattice structure or crystal structure)
d. solid structure
78. At standard conditions, most ionic compounds are solids
a. true
b. false
c. they are too varied to say
79. A binary compound consists of
a. one type of element
b. 2 types of metals
c. 2 types of non-metals
d. non of the above
80. The name of the binary compound, NF3
a. nitrotriflouride
b. nitrogen triflouride
c. mononitrogen triflouride
d. non of the above
81. The mass of one mole of the compound NF3 is
a. 33.0047
b. 71.0019
c. 266.0992
d. non of the above
82. If you have 100.0 grams of NF3 , how many grams of nitrogen do you have?
a. 19.73
b. 1.408
c.
6.022 x 1023
d. 14.00
83.
How many moles of F would you have is you had 100.0 g of NF3 ?
a. 1.409
b. 4.227
c. 56.97
d. 16.43
e. non of the above
84. What percent, by mass, in NF3 is nitrogen
a. 1.408
b. 14.02
c. 19.73
d. 17.92
85. The smallest whole number ratio that atoms combine in to form a compound is
known as the
a. molecular formula
b. actual formula
c. empirical formula
d. primary formula
e. non of the above
86. A 136.0584 g sample of a compound is analyzed and found to contain just
hydrogen and oxygen. It was determined that the sample contained 4.031%
hydrogen by mass. What is the empirical formula?
a. OH
b. H2O
c. H2O2
d. HO2
e. non of the above
87. Further analysis of the compound in # 86 shows that the molar mass of the
compound is 50.011 g/mol. What is the molecular formula?
a. OH
b. H2O
c. H2O2
d. HO2
e. non of the above
88. The formula for some ionic compounds is written with a dot and then H2O such as
.
CuCl2 2H2O
The dot in the center of the molecule means
a. The compound should be stored in water.
b. The compound is hydrated, meaning it has 2 water molecules associated with each
CuCl2
c. Water will come off as steam at room temperature.
d. None of the above.
89.
If you had which was labeled jar “anhydrous copper (II) chloride”. This would mean
that there was
a. The compound is stored in water
b. The compound has 2 water molecules per copper chloride molecule
c. There is no water present
d. non of the above
90. This was another good time. I am grateful I still have another chapter to go
a. true
b. absolutely
c. What kind of nut would think otherwise????
d. all of the above.