lont
1) The conjugate base of HSO4- is
2) \,1/hat is the pH of an aqueous solution at2S.O'C in which [H+] is 0.00250 M?
3) \Alhat is the conjugate base of OH-?
4) l4lhat is the pH of an aqueous solution at 25.0 oC in which IOH-I is 0.00250 M?
5) l{hat is the concentration (in M) of hydronium ions in a solution at 25.0 'C with pH = 4.282?
6) Calculate the pOH of a solution at 2S.0 "C that contains L.94 * 1.0-10 M hydronium ions.
7) lVhat is the pH of a 0.0150 M aqueous solution of barium hydroxide?
8)Anaqueoussolutioncontains0.100MNaoHat25.0oC.ThepHofthesolutionis-.
9)AccordingtotheArrheniusconcept,anacidisazubstancethat-.
A) tastes bitter
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) is capable of donating one or more FI+
E) reacts with the solvent to form the cation formed by autoionization of that solvent
10) A BrOnsted-Lowry base is defined as a substance that
A) acts as a proton acceptor
B) increases [H+] when placed in H2O
C) increases
tOH-l when placed in H2O
D) decreases [H+] when placed in H2O
E) acts as a proton donor
11)Asubstancethatiscapableofactingasbothanacidandasabaseis-.
A)
miscible
B)
autosomal
C)
amphoteric
D)
conjugated
E) saturated
D)
7.0A
E) 1.00
12) The molar concentration of hydroxide ion in pure water at 25'C is
A)
13)
0.00
B) 1.0
x10-14
g) L0 x 1o-7
ilIhich one of the following statements regarding K* is false?
A) The value of Kry shows that water is a weak acid.
B)
pK*
is 14.00 at 25"C
C) Kw is known as the ion product of water.
D) The value of
K- is always
1.0
E) Kw changes with temperature.
'
10-14.
pH of an aqueous solution at 25.0 'C is 10.66. What is the molarity of H+ in this solution?
A) 4.6, 10-4
B) 4.6 x 1010
C) 1.1 ,. 10-13
D) 3.3
14) The
E) 2.2
, tg-ll
15) Calculate the molarity of hydroxide ion in an aqueous solution that has a pOH of 5.33.
A)
8.67
B) 2.1. x
1Q-9
Cl 4.7 x
10-6
D) 5.3
' 10-14
E) 8.7
D) 1.4
,1A-2
E) 11.85
'
10-14
1"6)A7.0,.10-3Maqueousso1utionofCa(oH)2at25.0oChasapHof
A) 7.1 *
17) Lr basic
10-13
B)
12.15
C)
1.85
solutiorl
A) [HSO*] = [oH-l
B) [OH-l > 7.oo
C) [Fleo*l > [oH-]
D)[FI3O+]=0M
E) [F{so*]
18)
* [oH-]
Nitric acid is a stro.ng acid. This means that
A) HNO3 dissociates completely to H+(aq) and NO3-(aq) when it dissolves in water
B) HNO3 produces a gaseous product when it is neutralized
C) HNO3 cannot be neutralized by a weak-.base
D) HNO3 does not dissociate at all when it is dissolved in water
E) aqueous solutions of HNO3 contain equal concehtrations of H+(aq) and OH-(aq)
19) Of the foUowing
acids,
A) H2Soa
is not a strong acid.
B)
HCI
C)
HCIOa
D)
HNo2
E) HNo3
Answer Key
Testname: CHEMCH16AB
1) so422) 2.60
3)
02-
4)
+'11.4
5) 5.22
6)
4.21)
7) 12.5
8) 13.0
e)B
13) D
14) E
15) C
16) ts
17) E
18) A
1e)
n
- t)-t
li,q