Chem 051 - Fundamentals of Chemistry » Winter 2021 » Homework GOB Week 4
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Question #1
The mass percent concentration refers to
A.
grams of solute in 100 g of solvent.
B.
grams of solute in 100 g of solution.
C.
grams of solute in 1 kg of solvent.
D.
grams of solvent in 100 g of solution.
E.
grams of solute in 1 kg of solution.
Question #2
In a solution, the solvent
A.
can be a solid, liquid, or gas.
B.
is never a solid.
C.
is a liquid.
D.
is the substance present in the smallest concentration.
E.
can be a liquid or gas.
Question #3
The molarity (M) of a solution refers to
A.
moles of solute/L of solution.
B.
moles of solute/ L of solvent.
C.
grams of solute/100 mL of solution.
D.
moles of solute/100 mL of solution.
E.
grams of solute/L of solution.
Question #4
What is the molarity of a solution which contains 58.5 g of sodium chloride dissolved in 0.500 L of solution?
A.
2.00 M
B.
1.50 M
C.
4.00 M
D.
0.500 M
E.
1.00 M
Question #5
What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?
A.
0.75 L
B.
750 L
C.
0.25 L
D.
0.083 L
E.
0.075 L
Question #6
What mass of KCl is in 350 mL of 0.24 M KCl?
A.
1.1.g
B.
0.84 g
C.
18 g
D.
6.3 g
E.
84 g
Question #7
In water, a substance that ionizes completely in solution is called a
A.
weak electrolyte.
B.
strong electrolyte.
C.
nonconductor.
D.
semiconductor.
E.
nonelectrolyte.
Question #8
For Kw, the product of [H3O+] and [OH-] is
A.
1.0 X 10-1
B.
1.0 X 10-14
C.
1.0 X 1014
D.
1.0 X 10-7
E.
1.0
Question #9
What is the [H3O+] in a solution with [OH-] = 1 x 10-12 M?
A.
1 x 10-12 M
B.
1 x 10-7 M
C.
1 x 102 M
D.
1 x 10-8 M
E.
1 x 10-2 M
Question #10
What is the [OH-] in a solution that has a [H3O+] = 1 x 10-6 M?
A.
1 x 10-12 M
B.
1 x 10-6 M
C.
1 x 10-8 M
D.
1 x 10-10 M
E.
1 x 10-2 M
Question #11
What is the pH of a solution with [OH-] = 1 x 10-4 M?
A.
4.0
B.
1.0 x 10-10
C.
-10.0
D.
10.0
E.
-4.0
Question #12
The [H3O+] of a solution with pH = 2.0 is
A.
1 x 10-2 M.
B.
10 M.
C.
1 x 102 M.
D.
-10 M.
E.
1 x 10-12 M.
Question #13
The [H3O+] of a solution with pH = 8.7 is
A.
8.7 x 10-1 M.
B.
8.7 M.
C.
2 x 10-9 M.
D.
5 x 10-6 M.
E.
5.3 M.
Question #14
Which of the following is the strongest acid?
A.
H3PO4
B.
NH4+
C.
NaOH
D.
HCl
E.
H2CO3
Question #15
The name given to an aqueous solution of HBr is
A.
hypobromous acid.
B.
bromous acid.
C.
bromic acid.
D.
hydrobromic acid.
E.
hydrogen bromide.
Question #16
A solution with [ OH-] of 5 x 10-3 has a pH of ________.
A.
2.3
B.
-2.3
C.
7.0
D.
5.0
E.
11.7
Question #17
Ammonium hydroxide is a weak base because
A.
it dissociates only slightly in water.
B.
it is only slightly soluble in water.
C.
is a poor acceptor of protons.
D.
it is completely ionized in aqueous solution.
E.
it is a dilute solution.
Question #18
An acid and base react to form a salt and water in a(n) ________ reaction.
A.
reduction
B.
neutralization
C.
ionization
D.
oxidation
E.
dissociation
Question #19
In a neutralization reaction
A.
an acid and a salt react to form water and a base.
B.
two acids react to form water.
C.
an acid and a base react to form a salt and water.
D.
a base and a salt react to form water and an acid.
E.
water and a salt react to form an acid and a base.
Question #20
Which of the following is the correctly balanced equation for the complete neutralization of H3PO4 by Ca(OH)2?
A.
3H3PO4 + Ca(OH)2 → Ca3(PO4)2 + 5H2O
B.
H3PO4 + Ca(OH)2 → Ca3(PO4)2 + H2O
C.
H3PO4 + Ca(OH)2 → CaHPO4 + 2H2O
D.
2H3PO4 + 3Ca(OH)2 → Ca3(PO4)2 + 6H2O
E.
4H3PO4 + 6Ca(OH)2 → 2Ca3(PO4)2 + 12H2O
Question #21
The neutralization reaction between Al(OH)3 and HNO3 produces the salt with the formula
A.
AlNO3.
B.
Al(NO3)3.
C.
H2O.
D.
NO3OH.
Question #22
Which of the following is a neutralization reaction?
A.
KCl + NaNO3 → KNO3 + NaCl
B.
2NO2 → 2NO + O2
C.
HNO3 + KOH → H2O + KNO3
D.
H2O + SO3 → H2SO4
Question #23
25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. The molarity of the HCl solution is
A.
0.500 M.
B.
0.137 M.
C.
0.390 M.
D.
0.115 M.
E.
0.212 M.
Question #24
According to the Bronsted-Lowry definition,
A.
a base produces H+ ions in aqueous solutions.
B.
a base is a proton acceptor.
C.
a base is a proton donor.
D.
an acid acts as the solvent.
E.
an acid is a proton acceptor.
Question #25
If the carbon dioxide level in the blood is too high, more carbonic acid is produced, and this results in the condition termed acidosis.
A.
TRUE
B.
FALSE
Question #26
An acidic solution has a pH less than 7.0.
A.
TRUE
B.
FALSE
Question #27
A solution with a pH greater than 7 is basic.
A.
TRUE
B.
FALSE
Question #28
In any water solution, [H3O+] [OH-] = 1.0 x 10-7.
A.
TRUE
B.
FALSE
Question #29
An aqueous solution with [OH-] = 1.0 x 10-12 has a pH of 12.0.
A.
FALSE
B.
TRUE
Question #30
For many reactions of acids with bases, the resulting products are a salt and water.
A.
FALSE
B.
TRUE
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