Acids, Bases, and pH
Practice Test
1.
The fourth energy level can hold _______ more electrons than the third energy level.
a.
14
b.
6
c.
2
d.
10
2.
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.
1.52 L
c.
6.70 L
d.
22.4 L
3.
A solution that contains very little solute is described as ____________.
a.
saturated
b.
massive
c.
dilute
d.
concentrated
4.
What is the formula for perchloric acid?
a.
HCl
b.
HClO
4
c.
HClO
2
d.
HClO
3
5.
How many atoms of carbon are in a pure sample of carbon having a mass of 72.0 g?
a.
3.6 x 10 23
b.
4.33 x 10 25
c.
36 x 10 24
d.
3.6 x 10 24
6.
The pH scale is used to express the concentrations of hydronium ions and _____________ ions in aqueous solutions.
a.
carbon
b.
potassium
c.
hydroxide
d.
fluoride
7.
A chemical bond that results from a shared pool of valence electrons is called a ____________ bond.
a.
ionic
b.
directional
c.
polar covalent
d.
metallic
8.
How many grams of NaCl are dissolved in 500.0 mL of a 0.05M solution of NaCl?
a.
0.05 g
b.
0.29 g
c.
1.46 g
d.
2.92 g
9.
H
2
O is sometimes called ________________.
a.
a poor solvent
b.
a solution
c.
a specific solute
d.
the universal solvent
10.
The light emitted by the gas in a neon sign is _________________.
a.
an incandescent light
b.
a filament
c.
an electron
d.
an emission spectrum
11.
These compounds have a bitter taste and a slippery feel.
a.
acids
b.
hydrocarbons
c.
salts
d.
bases
12.
Calculate the number of moles of hydrogen atoms in 4.75 mol sulfuric acid.
a.
4.75 mol
b.
2.38 mol
c.
9.50 mol
d.
33.2 mol
13.
A base is a substance that produces ____________ ions when it dissolves in water.
a.
hydronium
b.
hydroxide
c.
carbonate
d.
sodium
14.
The center of positive charge in the H
2
O molecule lies ______________________.
a.
between the two hydrogen atoms
b.
in the geometric center of the molecule
c.
on the oxygen atom
d.
on one of the hydrogen atoms
15.
The boiling point of methane, CH
4
, is ___________ than that of water.
a.
slightly higher
b.
much higher
c.
much lower
d.
slightly higher
16.
If the theoretical yield of a reaction is 0.2100 g and the actual yield is 0.1880 g, what is the percent yield?
a.
112%
b.
89.50%
c.
51.30%
d.
11.00%
17.
Water forms ______________ in a glass tube.
a.
a convex meniscus
b.
a concave meniscus
c.
heavy water
d.
hydrogen and oxygen
18.
The two rows beneath the main body of the periodic table contain the _________________.
a.
halogens
b.
inner transition elements
c.
noble gases
d.
alkali metals
19.
These orbitals are aligned along the x, y, and z axes.
a.
p orbitals
b.
d orbitals
c.
s orbitals
d.
f orbitals
20.
_____________ is the measure of an atom's ability to attract electrons in a bond.
a.
Ionic radius
b.
Shielding
c.
melting point
d.
Electronegativity
