EBK BASIC CHEMISTRY
5th Edition
ISBN: 8220101472335
Author: Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 15.55AQAP
Which of the following are notation-reduction reactions? (15.1)
a.
b.
c.
d.
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(7.3) Write the half-cell reactions for each of
the following cells. Choose from the given
options the BEST answer. Write the
CAPITAL LETTER of your cholce.
(a) Ag I Ag* a H* I Hz 1 Pt
Answer:
Half-cell reactions: (A) ) & ()
(B) ) & (iv) (C) (i) & () (D)
(i) & (iv)
O Agʻ(aq) o Agts) + e
Ci) Agts) Ag'laq) +
Clii) 2 H"(aq, IM)
2e" - Hzg 1 atm)
(iv) Hag 1 atm) - 2 H'taq,
IM) * 2e
I Brzn PE
Answer:
Hall-cell reactions: (w W& Cii) (B)
(im & (i) (C) (1) & (iv)
& (iv)
(D) (i)
Crz0, ng • 14 H'cag) *• 6e
Ge 2 Cr*tag) + 7 H,0D
(ii) 2 Br 2e O Brzn
(iv) Brzo 2 Br+ 2e
(7.15a) What mass of copper is plated out in
the electrolysis of CUSO4, in the same time
that it takes to deposit 1.00g of Ag in a silver
coulometer that is arranged in series with
CUSO4 cell?
(7.15b) If a current of 1.00 A is used, how
many minutes is required to plate out this
quantity of copper?
Molar Mass (g/mol): Cu 63.546
Ag 107.87
Analysis/Strategy: ampere & time
coulombs ® mol e¯ (or Faraday) ® mol
®
Cu
® mass of Cu
time to plate out Cu = time to plate out
1.00 g Ag (in series with CuSO4 cell)
Reduction
half-reaction
of silver
metal: Ag*(aq)
+
e
® Ag(s)
Reduction half-reaction of copper
metal: Cu*2(aq) +
e
® Cu(s)
Answer: Mass of copper plated out =
g (3 sig fig)
Minutes required to plate out
copper using 1.00 ampere =
minutes (3 sig fig)
(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)
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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