Basic Chemistry
6th Edition
ISBN: 9780134878119
Author: Timberlake, Karen C. , William
Publisher: Pearson,
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Textbook Question
Chapter 15, Problem 72APP
In an acidic dry-cell battery, the following unbalanced halfreaction takes place in acidic solution:
a. Balance the half-reaction.
b. Is
c. Indicate whether the half-reaction takes place at the anode or cathode.
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Students have asked these similar questions
(7.11) A voltaic cell is constructed that uses
the following reaction and operates at 298
K:
Zn(s)
+ Cd+2,
Cd*2(aq) ®
+ (S)uZ
Zn*2(aq) + Cd(s)
a) What is the emf of the cell under
standard conditions?
Zn*2 (ag)
+ 2e¯ ® Zn(s)
E°cell = -0.76
V
cd*2 (aq)
+ 2e¯ ® Cd(s)
E°cell =
-0.40 V
Answer: The emf of the cell is
V.
Refer to the Table of Standard Reduction
Potential below to solve Question (a).
STANDARD REDUCTION POTENTIAL AT 25 °c
E() Hall Reaction
+0.N0 2 H,O) + ze Hg) + 2OH (a)
Hal-Reaction
Hall-Reaction
E(V)
Ag"(ng) +e- Ag(s)
--0.83
Aglir(s) +e- Ag(s) + Br (ag)
AgCKs) +e- Ag(s) + a"(a)
Ag(CN), "(a) +e Ag(s)+ 2CN (a)
Ag:Cro(s) + 2e 2 Ag(s) + Cro (ag)
+0.10 HO, (a) + H,O) + 2e 3OH (ay)
+0.22 H,O(ng) + 2H"(ag) + 2e 2 H;O()
-0.31 Hg/ (a) + 2e 2 Hg()
+0.45 2g"(ay) + 2e 1Hg (a)
-0.15 Hg" (a) + 2e - Hg()
+0.01 s) + 2e 21(a)
+1.78
+0.79
+0.92
Agl(s) +e- Ag(s) +I(ay)
+0.85
Ag(S0,) (ay) +e Ag(s) + 2 S,0 (ap)
+0.54
A (ay) + 3e Al(s)
HAso,(a) + 2H'(ay) + 2e - HAsOdany) + HO()
Ba"(ag) + 2e -…
(7.9) Using
potentials listed in the Table,
the
standard
reduction
determine
whether
the
following
reaction
is
spontaneous under standard conditions.
Support your answer.
Hg*2(aq) + 21¯(aq) →
,+2,
Hga) +I2(s)
From the Table:
Hg*2(aq) + 2e¯ → Hga)
E°red =
+0.85 V
I2(s)
+ 2e- - 21 (aq)
E°red =
+0.54 V
Answer: Is the above reaction
spontaneous? (YES or NO)
Briefly support your answer (.
Refer to the Table of Standard Reduction
Potential below.
STANDARD REDUCTION POTENTIAL AT 25 °C
ETV) atteaction
+0.50 2H,O + 2e-Hlg) + 20H (a
Hait-Reaction
(V)
Ag (ag) +- Agis)
Aglle(s)+- Ag)+ r (a)
AgCIs) - Ag(s) -a(ap)
Ag(CN), (a) eAgs)+ 2CN (a)
-O83
Agi+ r(a)
0.10 HO, (a) + HO) + 2e 3OH (a)
+0.22 HOa) + 2H(ag) 2e 2Ho)
-0.31 He(a 2e 2 Hg)
+0.45 2Hg"(a)+ 2e Hg ()
-0.15 He(a)+ 2e Hel)
) + 2e 21(a)
-1.46 2 10, (a) + 12H(a) + 10e l) +6HO)
+0.56K'(ag) K)
+1.78
a79
AgCro,(s) + 2e 2 Ags) + Cro )
Agl(s) +e- Ag) (a)
AgrS,0(a) + - Agis) + 25,0 (a)
A" (a) + 3e - A)
92
054
1.20
HAs0,n- 2H"(a) + 2e HAOa) + H,o)…
(7.7)
A voltaic cell based on the half-
reactions:
In (aq)
– In*3(ag) + 2e™
(aq)
Br2() +2e¯→ 2Br¯(ag)
The standard emf for this cell is +1.46 V.
Using the data below, calculate, E'red for
the reduction of In*3 to In*1.
Br2() + 2e¯ → 2B1¯(ag) (cathode)
E red(cathode) = E
%3D
Br(aq) = +1.06 V
(See Table below)
Choices:
(A) +0.40 V
(B) -0.40 V
(C) + 2.50 V
(D) -2.50 V
Answer: E'red for the reduction of
In+3 =
to In*1
(in
volts)
STANDARD REDUCTION POTENTIALS at 25°C;
Reduction Half Reaction
F: (g) + 2e → 2F (aq)
HO, (aq) + 2H" (aq) + 2e 2H;0
PbO(3) +4H" (ag) + So (ag) + 2e PbSO(s) + HO
MnO. (aq) + 8H" (aq)+ Se+ Ma" (ag) + 4H,o
Au" (aq) + 3e Au (s)
Ch (g) + 2e 2C (ag)
CrO (aq) + 14H" (aq) + 6e →2Cr" (aq) + TH:O
MnO: (3) i 4H" (aq) 2e Ma (aq) 2H:0
O: (g) + 4H" (aq) + 4e + 2H:0
Br: () +2e + 2Br (ag)
NO, (aq) + 4I" (aq) + 3e + NO (g) + 2H:0
2Hg (aq) + 2e Hg" (aq)
Hgr" (aq) + 2e→ 2Hg ()
Ag (aq) +e Ag (s)
Fe (aq) + e Fe (aq)
O: (g) - 21 (aq) + 2e HO: (ag)
E MnO" (aq) + 2H0 + 3e MnO: (3) + 40H…
Chapter 15 Solutions
Basic Chemistry
Ch. 15.1 - Identify each of the following as an oxidation or...Ch. 15.1 - Identify each of the following as an oxidation or...Ch. 15.1 - Prob. 3PPCh. 15.1 - Prob. 4PPCh. 15.1 - Prob. 5PPCh. 15.1 - Prob. 6PPCh. 15.1 - Prob. 7PPCh. 15.1 - Prob. 8PPCh. 15.1 - Prob. 9PPCh. 15.1 - Prob. 10PP
Ch. 15.1 - Prob. 11PPCh. 15.1 - Prob. 12PPCh. 15.1 - What is the oxidation number of the specified...Ch. 15.1 - What is the oxidation number of the specified...Ch. 15.1 - Prob. 15PPCh. 15.1 - Prob. 16PPCh. 15.1 - Prob. 17PPCh. 15.1 - Prob. 18PPCh. 15.1 - Prob. 19PPCh. 15.1 - Prob. 20PPCh. 15.2 - Balance each of the following half-reactions in...Ch. 15.2 - Prob. 22PPCh. 15.2 - Prob. 23PPCh. 15.2 - Use the half-reaction method to balance each of...Ch. 15.2 - Use the half-reaction method to balance each of...Ch. 15.2 - Use the half-reaction method to balance each of...Ch. 15.3 - Use the activity series in Table 15.3 to predict...Ch. 15.3 - Use the activity series in Table 15.3 to predict...Ch. 15.3 - Prob. 29PPCh. 15.3 - Prob. 30PPCh. 15.3 - Prob. 31PPCh. 15.3 - Prob. 32PPCh. 15.3 - The following half-reaction takes place in a...Ch. 15.3 - The following half-reaction takes place in a...Ch. 15.3 - The following half-reaction takes place in a...Ch. 15.3 - Prob. 36PPCh. 15.4 - What we call "tin cans" are really iron cans...Ch. 15.4 - Prob. 38PPCh. 15.4 - Prob. 39PPCh. 15.4 - Prob. 40PPCh. 15.4 - Prob. 41PPCh. 15.4 - Prob. 42PPCh. 15 - Prob. 43UTCCh. 15 - Prob. 44UTCCh. 15 - Prob. 45UTCCh. 15 - Prob. 46UTCCh. 15 - The chapter sections to review are shown in...Ch. 15 - The chapter sections to review are shown in...Ch. 15 - The chapter sections to review are shown in...Ch. 15 - Prob. 50UTCCh. 15 - Prob. 51UTCCh. 15 - Prob. 52UTCCh. 15 - The chapter sections to review are shown in...Ch. 15 - The chapter sections to review are shown in...Ch. 15 - Which of the following are oxidation-reduction...Ch. 15 - Which of the following are oxidation-reduction...Ch. 15 - In the mitochondria of human cells, energy is...Ch. 15 - Prob. 58APPCh. 15 - Prob. 59APPCh. 15 - Prob. 60APPCh. 15 - Prob. 61APPCh. 15 - Prob. 62APPCh. 15 - Prob. 63APPCh. 15 - Write the balanced half-reactions and a balanced...Ch. 15 - Prob. 65APPCh. 15 - Use the activity series in Table 15.3 to predict...Ch. 15 - Prob. 67APPCh. 15 - Prob. 68APPCh. 15 - Prob. 69APPCh. 15 - Prob. 70APPCh. 15 - Prob. 71APPCh. 15 - In an acidic dry-cell battery, the following...Ch. 15 - Steel bolts made for sailboats are coated with...Ch. 15 - Copper cooking pans are stainless steel pans...Ch. 15 - Prob. 75CPCh. 15 - Prob. 76CPCh. 15 - Prob. 77CPCh. 15 - The following problems are related to the topics...Ch. 15 - The following problems are related to the topics...Ch. 15 - The following problems are related to the topics...Ch. 15 - Prob. 81CPCh. 15 - Prob. 82CPCh. 15 - Prob. 83CPCh. 15 - Prob. 84CPCh. 15 - Prob. 85CPCh. 15 - Prob. 86CPCh. 15 - Prob. 87CPCh. 15 - Prob. 88CP
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