Chemistry 51 - Fundamentals of Chemistry » Fall 2021 » Chapter 10 Homework
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Question #1
If a base is 100% ionized when dissolved in water, it is considered a(n) _______ base.
A.
strong
B.
weak
Question #2
Which of the following statements is true regarding the Brønsted-Lowry acids and bases?
A.
A Brønsted-Lowry base is a compound that accepts a peroxide ion in a reaction.
B.
A Brønsted-Lowry base is a compound that supplies an amide ion in a reaction.
C.
A Brønsted-Lowry acid is a compound that accepts a hydronium ion in a reaction.
D.
A Brønsted-Lowry acid is a compound that supplies a hydrogen ion in a reaction.
E.
All Brønsted-Lowry acids and bases are Arrhenius acids and bases.
Question #3
Consider the following reaction: H2O(ℓ) + NO2–(aq) → HNO2(aq) + OH–(aq) In this reaction water acts as a Brønsted-Lowry acid.
A.
TRUE
B.
FALSE
Question #4
Which of the following compounds can be combined with Na3PO4 to make a buffer solution?
A.
HClO4
B.
H3PO4
C.
HCl
D.
NaCl
E.
Mg(OH)2
Question #5
HNO2 is the chemical formula for _____.
A.
nitrous acid
B.
potassium hydroxide
C.
chlorous acid
D.
magnesium hydroxide
E.
ammonia
Question #6
One of the buffers in human blood is based in part on what ion?
A.
bicarbonate
B.
acetate
C.
sulfite
D.
chloride
E.
nitrate
Question #7
Which of the following combinations of compounds can make a buffer solution?
A.
HC2H3O2 and NH3
B.
KOH and H2SO4
C.
NH3 and NH4Cl
D.
NaOH and CaCl2
E.
HBr and Mg(NO3)2
Question #8
Which of the following products are generated during the following chemical reaction? NH3(aq) + H2O(ℓ) → _____(aq) + _____(aq)
A.
NH2–; H3O+
B.
NH4+; OH–
C.
NO3–; H+
D.
NH2–; O2–
E.
NO2–; NH4+
Question #9
The name of the acid that has the formula H2Se is _______ acid.
A.
Hydroseleric
B.
Hydroselenium
C.
Hydroselenic
Question #10
Identify the reactant in the following chemical reaction. _____(aq) + H2O(ℓ) ⇌ NO2–(aq) + H3O+(aq)
A.
NaOH
B.
C6H5NH2
C.
NH3
D.
HNO2
E.
C8H10N4O2
Question #11
Which of the following statements is true about pH values?
A.
The pH value of pure water is 5.
B.
The pH value of blood is 0.7.
C.
The pH value of 1 M Ca(OH)2 is 2.
D.
The pH value of lime juice is 11.
E.
The pH value of 1 M NaOH is 14.
Question #12
Which of the following salts is formed in the neutralization reaction between H2SO4 and NaOH?
A.
NaS
B.
NaHSO4
C.
Na2SO4
D.
S2(NO3)2
E.
Na(SO4)2
Question #13
NH3 and (NH4)3PO4 would make a buffer solution.
A.
TRUE
B.
FALSE
Question #14
Acids change the color of litmus to _______.
A.
green
B.
red
Question #15
A pH below 7 indicates a basic solution.
A.
TRUE
B.
FALSE
Question #16
A Brønsted-Lowry acid is a compound that donates a hydrogen ion in a reaction.
A.
FALSE
B.
TRUE
Question #17
Which of the following reactions constitutes autoionization of water?
A.
H2O(ℓ) + H2O(ℓ) → H3O+(aq) + OH–(aq)
B.
NH3(aq) + H2O(ℓ) → NH4+(aq) + OH–(aq)
C.
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(ℓ)
D.
H2O(ℓ) + NH2–(aq) → OH–(aq) + NH3(aq)
E.
HCl + H2O(ℓ) → H3O+(aq) + Cl–(aq)
Question #18
Arrhenius defined a base as a compound that increases the concentration of hydride ions in a solution.
A.
FALSE
B.
TRUE
Question #19
Which of the following is an Arrhenius acid?
A.
Ba(OH)2
B.
H3PO4
C.
NaNH2
D.
KOH
E.
NaH
Question #20
The name of the base Ca(OH)2 is _______.
A.
Calcium hydroxide
B.
Calcium oxide
C.
Calcium dioxide
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