EBK BASIC CHEMISTRY
5th Edition
ISBN: 8220101472335
Author: Timberlake
Publisher: PEARSON
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Chapter 15, Problem 15.68AQAP
In a voltaic cell, one half-cell consists of zinc metal in a
- the anode
- the cathode
- the half-reaction at the anode
- the half-reaction at the cathode
- the overall reaction
- the shorthand cell notation
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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 -…
(7.12) A technician plates a faucet with 0.86
g Cr metal by electrolysis of aqueous
Cr2(SO4)3. If 12.5 min is allowed for the
plating, what current is needed?
Molar mass of Cr: 51.996 g/mol
Analysis/Strategy: mass of Cr ® mol Cr
mol e¯ (or Faraday) ® coulombs ®
amperes
Reduction half-reaction of chromium
solution to chromium metal: Cr*
,+3,
(aq)
e¯ ® Cr(s)
+
chromium solution, Cr2(SO4)3, has the
ions: [Cr*3 s04-²]
Answer: The current needed is
ampere. (2 sig fig)
Fill in the blanks:
(7.14) In the electrolysis of CUSO4, how
much copper is plated out on the cathode by
a current of a 0.75A in 10 minutes?
(Cu 63.546 g/mol)
Analysis/Strategy: ampere & time
coulombs ® mol e¯ (or Faraday) ® mol
Cu
(R
mass of Cu
Reduction half-reaction of copper
solution to copper metal: Cu*²(aq)
+
e¯ ® Cu(s)
copper solution, CUSO4, has the ions:
[Cu*2 SOq]
Answer: The mass of copper plated out is
g Cu. (3 sig fig)
Chapter 15 Solutions
EBK BASIC CHEMISTRY
Ch. 15.1 - Prob. 15.1QAPCh. 15.1 - Prob. 15.2QAPCh. 15.1 - Prob. 15.3QAPCh. 15.1 - Prob. 15.4QAPCh. 15.1 - Prob. 15.5QAPCh. 15.1 - Prob. 15.6QAPCh. 15.1 - Prob. 15.7QAPCh. 15.1 - Prob. 15.8QAPCh. 15.1 - Prob. 15.9QAPCh. 15.1 - Prob. 15.10QAP
Ch. 15.1 - Prob. 15.11QAPCh. 15.1 - Prob. 15.12QAPCh. 15.1 - Prob. 15.13QAPCh. 15.1 - Prob. 15.14QAPCh. 15.1 - Prob. 15.15QAPCh. 15.1 - Prob. 15.16QAPCh. 15.1 - Prob. 15.17QAPCh. 15.1 - Prob. 15.18QAPCh. 15.1 - Prob. 15.19QAPCh. 15.1 - Prob. 15.20QAPCh. 15.2 - Prob. 15.21QAPCh. 15.2 - Prob. 15.22QAPCh. 15.2 - Use the half-reaction method to balance each of...Ch. 15.2 - Prob. 15.24QAPCh. 15.2 - Use the halt-reaction method to balance each of...Ch. 15.2 - Prob. 15.26QAPCh. 15.3 - Prob. 15.27QAPCh. 15.3 - Prob. 15.28QAPCh. 15.3 - Prob. 15.29QAPCh. 15.3 - Prob. 15.30QAPCh. 15.3 - Prob. 15.31QAPCh. 15.3 - Prob. 15.32QAPCh. 15.3 - Prob. 15.33QAPCh. 15.3 - Prob. 15.34QAPCh. 15.3 - Prob. 15.35QAPCh. 15.3 - Prob. 15.36QAPCh. 15.4 - Prob. 15.37QAPCh. 15.4 - Prob. 15.38QAPCh. 15.4 - Prob. 15.39QAPCh. 15.4 - Prob. 15.40QAPCh. 15 - Prob. 15.41FUCh. 15 - Prob. 15.42FUCh. 15 - Prob. 15.43UTCCh. 15 - Prob. 15.44UTCCh. 15 - Prob. 15.45UTCCh. 15 - Prob. 15.46UTCCh. 15 - Prob. 15.47UTCCh. 15 - Prob. 15.48UTCCh. 15 - Prob. 15.49AUTCCh. 15 - Prob. 15.50AUTCCh. 15 - Prob. 15.51AUTCCh. 15 - Prob. 15.52AUTCCh. 15 - Prob. 15.53AUTCCh. 15 - Prob. 15.54AUTCCh. 15 - Which of the following are notation-reduction...Ch. 15 - Prob. 15.56AQAPCh. 15 - Prob. 15.57AQAPCh. 15 - Prob. 15.58AQAPCh. 15 - 15.59 Assign oxidation numbers to all the elements...Ch. 15 - Prob. 15.60AQAPCh. 15 - Assign oxidation numbers to all the elements in...Ch. 15 - Assign oxidation numbers to all the elements in...Ch. 15 - Prob. 15.63AQAPCh. 15 - Prob. 15.64AQAPCh. 15 - 15.65 Use the activity series in Table 15.3 to...Ch. 15 - Prob. 15.66AQAPCh. 15 - Prob. 15.67AQAPCh. 15 - In a voltaic cell, one half-cell consists of zinc...Ch. 15 - Prob. 15.69AQAPCh. 15 - 15.70 Use the activity series in Table 15.3 to...Ch. 15 - 15.71 In a lead storage battery. the following...Ch. 15 - Prob. 15.72AQAPCh. 15 - Prob. 15.73AQAPCh. 15 - Prob. 15.74AQAPCh. 15 - Prob. 15.75CQCh. 15 - Prob. 15.76CQCh. 15 - Prob. 15.77CQCh. 15 - Prob. 15.78CQCh. 15 - Prob. 15.79CQCh. 15 - Prob. 15.80CQCh. 15 - Prob. 15.81CQCh. 15 - The following unbalanced reaction takes place in...Ch. 15 - Prob. 15.83CQCh. 15 - Prob. 15.84CQCh. 15 - Using the activity series in Table 15.3, indicate...Ch. 15 - Using the activity series in Table 15.3, indicate...Ch. 15 - Prob. 15.87CQCh. 15 - Prob. 15.88CQ
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