Acids and Bases React
Practice Test
1.
A ____________ reaction is one in which a compound breaks down into two or more simpler substances.
a.
decomposition
b.
synthesis
c.
photosynthesis
d.
replacement
2.
Calculate the mass in grams of 0.0790 moles of aluminum.
a.
34 g
b.
1.0 g
c.
2.1 g
d.
21 g
3.
An aqueous solution of a weak acid contains ___________________ unionized acid molecules.
a.
a low concentration of
b.
a high concentration of
c.
no
d.
100%
4.
According to the equation 2HBr + Na
2
CO
3
NaBr + H
2
O + CO
2
, what volume of CO
2
at 1.230 atm and 325 K is produced by 50.0 g of HBr reacting with an excess of Na
2
CO
3
?
a.
50.0 L
b.
6.70 L
c.
22.4 L
d.
1.52 L
5.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
1.1 M
b.
6.2
c.
0.75 M
d.
0.015 M
6.
Because of all its water, Earth is nicknamed the _____________.
a.
wet planet
b.
blue planet
c.
dense planet
d.
spherical planet
7.
What is the coefficient for NaOH in the equation that describes its reaction with CO
2
to produce Na
2
CO
3
and H
2
O?
a.
3
b.
4
c.
2
d.
1
8.
What is the net ionic equation for the reaction of a hydrogen carbonate antacid with hydrochloric acid?
a.
HCO
3
-
(aq) + HCl(aq)
H
2
O(l) + CO
2
(g) + Cl
-
(aq)
b.
H
2
CO
3
(aq) + 2HCl(aq)
2H
2
O(l) + CO
2
(g) + Cl
-
(aq)
c.
HCO
3
-
(aq) + H
+
(aq)
H
2
O(l) + CO
2
(g)
d.
HCO
3
-
(aq) + H
+
(aq)
H
2
CO
3
(g)
9.
Which of the following compounds is NOT a base?
a.
KOH
b.
KCN
c.
NH
3
d.
NaOH
10.
How many moles of calcium are in 0.544 g of calcium?
a.
3.11
b.
0.0136
c.
0.0773
d.
0.554
11.
Nonmetal oxides are _________________.
a.
basic anhydrides
b.
nonpolar solutes
c.
acidic anhydrides
d.
hydrides
12.
Molarity equals ______________________.
a.
grams of solute per gram of solution
b.
liters of solute per kilogram of solution
c.
moles of solute per liter of solution
d.
grams of solute per liter of solution
13.
A pH 2 solution is ___________ times more acidic than a pH 4 solution.
a.
one hundred
b.
one million
c.
two
d.
ten
14.
Acid-base reactions are usually __________________ reactions.
a.
synthesis
b.
combustion
c.
double-displacement
d.
decomposition
15.
A solid that forms from a solution during a chemical reaction is called a ______________.
a.
substrate
b.
precipitate
c.
formate
d.
reactant
16.
According to the Bronsted-Lowry definition, an acid is a _______________.
a.
hydrogen-ion acceptor
b.
electron acceptor
c.
hydrogen-ion donor
d.
electron donor
17.
The positive and negative portions of two ionic compounds are interchanged in this type of reaction.
a.
single displacement
b.
decomposition
c.
synthesis
d.
double displacement
18.
Your body is about __________ water by weight.
a.
60%
b.
75%
c.
90%
d.
10%
19.
Ions that are present in a solution but that do not participate in the reaction are called ________________.
a.
products
b.
reactants
c.
gases
d.
spectator ions
20.
What is the theoretical yield of nitrogen gas if 200 g of sodium azide decomposes?
a.
400 g
b.
127 g
c.
200 g
d.
135 g
