(7.9) Using the standard reduction potentials listed in the Table, determine following spontaneous under standard conditions. whether the reaction is Support your answer. Hg* (aq) + 21¯(aq) - Hga) +I2(s) From the Table: Hg (aq) * ,+2, - 2e- - Hg1) E°red = +0.85 V I2(s) + 2e- - 21¯(aq) E°red = %3D +0.54 V Answer: Is the above reaction spontaneous? (YES or NO) Briefly support your answer (.

Chemistry for Engineering Students
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ISBN:9781285199023
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Chapter1: Introduction To Chemistry
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Problem 1.77PAE
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(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)
--2.92
Ba"(a)+ 2e al)
u'(ag) +e- LA)
+0.32 Mg"(a)+ 2e Mg)
+1.07 Mn ()+ 2e- Mn(s)
-2.37
HO () + 21H" () + 3e- N(s) + HO)
len + 2e- 2 (a)
2 Bro, (a)- 12H (a)+ 10e - Ben+ 6 HOU)
-LI8
+1.52 Mno 4H(a)+ 2e Mn(a)+ 2H0
-0.49 MnO, () BH(a) Se- Ma () 41,On
1.23
Ca"(a) + 2e Cats)
Ca"(a) + 2e cas)
Ce"(a) e -Ce"(a)
Cle) + 2e- 2cr(a)
2HCIO() 2H'(a)+ 2e C 2HOU)
CIO (ag + HO) + 2e Cr (a) + 20H (a)
2 CIO, (a)+ 12H(a) 10e C 6H,On
Co(a) 2e Co(s)
Co"(a) Co"(ay)
Cr"(a) 3e Crs)
Cr"(a) - C"(a)
Co (ay) + 14H(a)+ 6e- 2C(a)+ 7H,O) +1.33 "(a) + 2e- P)
-2.87
Mno, (n) 21O)+ 3e Meo) 4OH(a) a59
-0.40 HNO,(a)+ (a) + r- NO) + HO)
+1.61 N) + 41O)+4e 4OH (ag + NHda)
+1.36 N) SH(a)+4e NH, (ag)
+1.63 NO, tarn+ 4(a)+ 3e- NO)+ 21HOU)
100
-L16
--0.23
+96
+0.9 Na'(a) Na(s)
+1.47 N(a)+2e- N)
-2.71
-0.28
-0.28 otr)4H'() +4e 21HOU)
1.23
+1 oe) + 2 HO) + de -4 OH G)
0.40
-0.74 Or)2H() 2e HOng)
-0.41 o,) + 2(a) + 2e- On + HO)
+207
-Q.13
CO (a) + 4HO 3r
-0.13 o) HSO, ) 3Hp- 2e-
1.69
Ce(OH)+ SOH (a
+0.34 rtso) + H"(ag)+ 2e - I) + SO, (a)
+0.15 PCI (a) + 2e P) + 4Cr(a
-0.36
Cu"(a) + 2e Culs)
Cu"(a) Cu'(a)
Cu'len +e Cuts)
a73
+0.52 S(s)+ 2H'(a)+ 2e H)
Cul(s) +e- Cu(s) + T(ag)
Ede) + 2e- 2F(a)
(a)- 2e Fe)
045
-0.19 HSOag) + 4H"(a) + 4e- S) + 3H,On
+27 HSO, ng) 3H"(a) + 2e HS0 ag) + HO)
-0.44 S(a)+ 2e Sns)
+0.77 Set(a)+ 2e- S ()
--a14
FeCN) (a) + FeCN) Gn
2H(ag)+ 2e Hl)
vo,(a) + 2H (a)e vo" (a) + HO)
a00 Z a)+ 2e- Zn(s)
+0.
100
--a76
Transcribed Image Text:(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) --2.92 Ba"(a)+ 2e al) u'(ag) +e- LA) +0.32 Mg"(a)+ 2e Mg) +1.07 Mn ()+ 2e- Mn(s) -2.37 HO () + 21H" () + 3e- N(s) + HO) len + 2e- 2 (a) 2 Bro, (a)- 12H (a)+ 10e - Ben+ 6 HOU) -LI8 +1.52 Mno 4H(a)+ 2e Mn(a)+ 2H0 -0.49 MnO, () BH(a) Se- Ma () 41,On 1.23 Ca"(a) + 2e Cats) Ca"(a) + 2e cas) Ce"(a) e -Ce"(a) Cle) + 2e- 2cr(a) 2HCIO() 2H'(a)+ 2e C 2HOU) CIO (ag + HO) + 2e Cr (a) + 20H (a) 2 CIO, (a)+ 12H(a) 10e C 6H,On Co(a) 2e Co(s) Co"(a) Co"(ay) Cr"(a) 3e Crs) Cr"(a) - C"(a) Co (ay) + 14H(a)+ 6e- 2C(a)+ 7H,O) +1.33 "(a) + 2e- P) -2.87 Mno, (n) 21O)+ 3e Meo) 4OH(a) a59 -0.40 HNO,(a)+ (a) + r- NO) + HO) +1.61 N) + 41O)+4e 4OH (ag + NHda) +1.36 N) SH(a)+4e NH, (ag) +1.63 NO, tarn+ 4(a)+ 3e- NO)+ 21HOU) 100 -L16 --0.23 +96 +0.9 Na'(a) Na(s) +1.47 N(a)+2e- N) -2.71 -0.28 -0.28 otr)4H'() +4e 21HOU) 1.23 +1 oe) + 2 HO) + de -4 OH G) 0.40 -0.74 Or)2H() 2e HOng) -0.41 o,) + 2(a) + 2e- On + HO) +207 -Q.13 CO (a) + 4HO 3r -0.13 o) HSO, ) 3Hp- 2e- 1.69 Ce(OH)+ SOH (a +0.34 rtso) + H"(ag)+ 2e - I) + SO, (a) +0.15 PCI (a) + 2e P) + 4Cr(a -0.36 Cu"(a) + 2e Culs) Cu"(a) Cu'(a) Cu'len +e Cuts) a73 +0.52 S(s)+ 2H'(a)+ 2e H) Cul(s) +e- Cu(s) + T(ag) Ede) + 2e- 2F(a) (a)- 2e Fe) 045 -0.19 HSOag) + 4H"(a) + 4e- S) + 3H,On +27 HSO, ng) 3H"(a) + 2e HS0 ag) + HO) -0.44 S(a)+ 2e Sns) +0.77 Set(a)+ 2e- S () --a14 FeCN) (a) + FeCN) Gn 2H(ag)+ 2e Hl) vo,(a) + 2H (a)e vo" (a) + HO) a00 Z a)+ 2e- Zn(s) +0. 100 --a76
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