Chem 134 Ch16.(Acid Base Equilibria)
1) According to the Arrhenius concept, an acid is a substance that __________.
A) is capable of donating one or more H+
B) causes an increase in the concentration of H+ in aqueous solutions
C) can accept a pair of electrons to form a coordinate covalent bond
D) reacts with the solvent to form the cation formed by autoionization of that solvent
E) tastes bitter - answerB
2) A BrOMnsted-Lowry base is defined as a substance that __________.
A) increases [H+] when placed in H2O
B) decreases [H+] when placed in H2O
C) increases [OH-] when placed in H2O
D) acts as a proton acceptor
E) acts as a proton donor - answerD
3) What is the conjugate acid of NH3?
A) NH3
B) NH2+
C) NH3+
D) NH4+
E) NH4OH - answerD
4) What is the conjugate base of OH-?
A) O2
B) O-
C) H2O
D) O2-
E) H3O+ - answerD
5) Which one of the following cannot act as a Lewis base?
A) Cl-
B) NH3
C) BF3
D) CN-
E) H2O - answerC
6) In the reaction
BF3 + F- ¬ BF4-
BF3 acts as a(n) __________ acid.
A) Arrhenius
, B) BrOMnsted-Lowry
C) Lewis
D) Arrhenius, BrMnsted-Lowry, and Lewis
E) Arrhenius and BrMnsted-Lowry - answerC
7) Of the following, the acid strength of __________ is the greatest.
A) CH3COOH
B) ClCH2COOH
C) Cl2CHCOOH
D) Cl3CCOOH
E) BrCH2COOH - answerD
8) Of the following, which is the strongest acid?
A) HClO
B) HF
C) HBr
D) HI
E) HCl - answerD
9) The molar concentration of hydronium ion in pure water at 25eC is __________.
A) 0.00
B) 1.0 * 10^-7
C) 1.0 * 10^-14
D) 1.00
E) 7.00 - answerB
10) The magnitude of Kw indicates that __________ .
A) water autoionizes very slowly
B) water autoionizes very quickly
C) water autoionizes only to a very small extent
D) the autoionization of water is exothermic
E) the autoionization of water is endothermic - answerC
11) What is the pH of a 0.015-M aqueous solution of barium hydroxide?
A) 12.48
B) 12.18
C) 1.82
D) 10.35
E) 1.52 - answerA
12) An aqueous solution contains 0.10 M NaOH. The solution is ____________.
A) very dilute
B) highly colored
C) basic
D) neutral
E) acidic - answerC
1) According to the Arrhenius concept, an acid is a substance that __________.
A) is capable of donating one or more H+
B) causes an increase in the concentration of H+ in aqueous solutions
C) can accept a pair of electrons to form a coordinate covalent bond
D) reacts with the solvent to form the cation formed by autoionization of that solvent
E) tastes bitter - answerB
2) A BrOMnsted-Lowry base is defined as a substance that __________.
A) increases [H+] when placed in H2O
B) decreases [H+] when placed in H2O
C) increases [OH-] when placed in H2O
D) acts as a proton acceptor
E) acts as a proton donor - answerD
3) What is the conjugate acid of NH3?
A) NH3
B) NH2+
C) NH3+
D) NH4+
E) NH4OH - answerD
4) What is the conjugate base of OH-?
A) O2
B) O-
C) H2O
D) O2-
E) H3O+ - answerD
5) Which one of the following cannot act as a Lewis base?
A) Cl-
B) NH3
C) BF3
D) CN-
E) H2O - answerC
6) In the reaction
BF3 + F- ¬ BF4-
BF3 acts as a(n) __________ acid.
A) Arrhenius
, B) BrOMnsted-Lowry
C) Lewis
D) Arrhenius, BrMnsted-Lowry, and Lewis
E) Arrhenius and BrMnsted-Lowry - answerC
7) Of the following, the acid strength of __________ is the greatest.
A) CH3COOH
B) ClCH2COOH
C) Cl2CHCOOH
D) Cl3CCOOH
E) BrCH2COOH - answerD
8) Of the following, which is the strongest acid?
A) HClO
B) HF
C) HBr
D) HI
E) HCl - answerD
9) The molar concentration of hydronium ion in pure water at 25eC is __________.
A) 0.00
B) 1.0 * 10^-7
C) 1.0 * 10^-14
D) 1.00
E) 7.00 - answerB
10) The magnitude of Kw indicates that __________ .
A) water autoionizes very slowly
B) water autoionizes very quickly
C) water autoionizes only to a very small extent
D) the autoionization of water is exothermic
E) the autoionization of water is endothermic - answerC
11) What is the pH of a 0.015-M aqueous solution of barium hydroxide?
A) 12.48
B) 12.18
C) 1.82
D) 10.35
E) 1.52 - answerA
12) An aqueous solution contains 0.10 M NaOH. The solution is ____________.
A) very dilute
B) highly colored
C) basic
D) neutral
E) acidic - answerC
