Solutions
Practice Test
1.
The _________ symbol separates the reactants from the products and means "to yield".
a.
→
b.
+
c.
(s)
d.
(g)
2.
The chemical equation Zn + 2HCl → H
2
+ ZnCl
2
represents a _________.
a.
single-replacement reaction
b.
synthesis reaction
c.
double-replacement reaction
d.
decomposition reaction
3.
The process of a solvent and a solute completely mixing and forming a solution is ________.
a.
solvation
b.
salvation
c.
ionization
d.
crystallization
4.
The components of a chemical equation that are left after the spectator ions are removed are the ____________.
a.
products
b.
participating ions
c.
reactants
d.
spectator ions
5.
What are the products of the reaction between barium hydroxide and hydrochloric acid?
a.
barium chloride and barium hydride
b.
barium chloride and water
c.
barium hydroxide and water
d.
chloric acid and barium
6.
Consider the following balanced equation. Which one of the following statements is false?
a.
One molecule of O
2
will react with 2 molecules of H
2
.
b.
Two molecules of H
2
will produce one molecule of H
2
O.
c.
One molecule of O
2
will produce 2 molecules of H
2
O.
d.
Two molecules of H
2
will produce two molecules of H
2
O.
7.
Which of the following molecules can form hydrogen bonds?
a.
NaH
3
b.
NH
3
c.
BaH
3
d.
CH
3
8.
The Tyndall effect describes ______________.
a.
the scattering of light by colloidal particles
b.
hydrophobic interactions between nonpolar molecules
c.
the adsorption of positive ions onto the surface of a hydrophilic solid
d.
precipitation of colloidal particles using electrically charged plates
9.
A solution that contains less solute per volume of solvent than another solution made from the same components is said to be more ________.
a.
dissolved
b.
concentrated
c.
solvated
d.
dilute
10.
The boiling points of the halogens increase in the order F
2
< Cl
2
< Br
2
< I
2
due to an increase in ____________.
a.
permanent dipoles
b.
dispersion forces
c.
hydrogen bonding
d.
ionic interactions
11.
Which one of the following is an example of an emulsion?
a.
shaving cream
b.
fog
c.
mayonnaise
d.
styrofoam
12.
A solid whose individual particles are arranged in an orderly, geometric, three-dimensional structure is a ___________.
a.
unit cell
b.
amorphous solid
c.
crystalline solid
d.
liquid crystal
13.
A solution is said to be ________ when more solute can be dissolved in the solvent at a given temperature.
a.
supersaturated
b.
unsaturated
c.
saturated
d.
solvated
14.
If 4.27 g sucrose (C
12
H
22
O
11
) are dissolved in 15.2 g water, what is the boiling point of the resulting solution? K
b
for water = 0.512°C/
m
.
a.
99.626°C
b.
101.64°C
c.
100.73°C
d.
100.42°C
15.
Na+(aq) is a _________________ in the following complete ionic equation.
H
+
(aq) + Cl
-
(aq) + Na
+
(aq) + OH
-
(aq) → Na
+
(aq) + Cl
-
(aq) + H
2
O(l)
a.
reacting compound
b.
participating ion
c.
spectator ion
d.
reacting molecule
16.
Which of the following materials will have the greatest viscosity?
a.
vinegar
b.
air
c.
cooking oil
d.
water
17.
The point on a phase diagram where the solid state, the liquid state, and the gas vapor state can coexist is _________.
a.
the triple point
b.
the critical point
c.
the absolute zero point
d.
the pressure point
18.
Which of the following is not a colligative property?
a.
boiling point elevation
b.
vapor pressure lowering
c.
freezing point depression
d.
increasing solubility
19.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
0.015 M
b.
1.1 M
c.
0.75 M
d.
6.2
20.
The phase change that describes the direct conversion of a solid into a gas is _______.
a.
sublimation
b.
melting
c.
vaporization
d.
deposition
