2. Calculate AGº and Kc for the following reaction at 298K: Br₂(1) + 21 (aq) (R:8.314J/mol.K, 96500 J/V.mol) 2Br (aq) + 1₂(s)

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Table 20.1 Standard reduction potentials at 25°C*
Increasing strength as oxidizing agent
Half-Reaction
Li*(aq) + e
K+ (aq) + e
Ba²+ (aq) + 2e
Sr²+ (aq) + 2e-
Ca²+ (aq) + 2e
Na + (aq) + e
Mg²+ (aq) + 2e
Be²+ (aq) + 2e
Al³+ (aq) + 3e
Mn²+ (aq) + 2e
2H₂O + 2e™
Zn²+ (aq) + 2e-
Cr³+ (aq) + 3e
Fe²+ (aq) + 2e
Cd²+ (aq) + 2e
PbSO4(s) + 2e
Co²+ (aq) + 2e
Ni²+ (aq) + 2e
2+
Sn²+ (aq) + 2e
Pb²+ (aq) + 2e
Li(s)
K(s)
Ba(s)
→ Sr(s)
Ca(s)
Na(s)
Mg(s)
Be(s)
Al(s)
→→ Mn(s)
H₂(g) + 2OH(aq)
Zn(s)
Cr(s)
Fe(s)
Cd(s)
Pb(s) +
Co(s)
Ni(s)
Sn(s)
Pb(s)
H₂(g)
Sn²+ (aq)
+ SO² (aq)
4+
2H¹ (aq) + 2e
Sn¹+ (aq) + 2e
Cu²+ (aq) + e
→ Cut (aq)
SO (aq) + 4H+ (aq) + 2e SO₂(g) + 2H₂O
AgCl(s) + e → Ag(s) + Cl(aq)
Cu²+ (aq) + 2e
Cu(s)
O₂(g) + 2H₂O + 4e¯¯ →
[₂ (s) + 2e →→→→→→→ 21 (aq)
MnO4 (aq) + 2H₂O + 3e -
O₂(g) + 2H+ (aq) + 2e¯
Fe²+ (aq)
Fe³+ (aq) + e
Ag (aq) + e
Ag(s)
Hg2+ (aq) + 2e
2Hg²+ (aq) + 2e →
NO3(aq) + 4H+ (aq) + 3e
2Hg(1)
40H (aq)
H₂O₂(aq) + 2H+ (aq) + 2e¯
Co³+ (aq) + e
O3(g) + 2H+ (aq) + 2e
F₂(g) + 2e →→→ 2F (aq)
Hg2+ (aq)
MnO₂ (s) + 4OH(aq)
H,Oz(aq)
Br₂(l) + 2e →→→ 2Br (aq)
O₂(g) + 4H+ (aq) + 4e¯
MnO₂ (s) + 4H+ (aq) + 2e →
Cr₂O² (aq) + 14H+ (aq) + 6e
Cl₂(g) + 2e →
Au³+ (aq) + 3e
2C1 (aq)
-
Au(s)
MnO4 (aq) + 8H+ (aq) + Se¯→→→→→
Ce+ (aq) + e
Ce ³+ (aq)
PbO₂ (s) + 4H+ (aq) + SO² (aq) + 2e¯
2H₂O
O₂(g) + H₂O(l)
NO(g) + 2H₂O
Co*(aq)
2H₂O
Mn²+ (aq) + 2H₂O
2Cr³+ (aq) + 7H₂O
2+
Mn²+ (aq) + 4H₂O
-> PbSO4(s) + 2H₂O
8° (V)
-3.05.
-2.93
-2.90
-2.89
-2.87
-2.71
-2.37
-1.85
-1.66
-1.18
-0.83
-0.76
-0.74
-0.44
-0.40
-0.31
-0.28
-0.25
-0.14
-0.13
0.00
+0.13
+0.15
+0.20
+0.22
+0.34
+0.40
+0.53
+0.59
+0.68
+0.77
+0.80
+0.85
+0.92
+0.96
+1.07
+1.23
+1.23
+1.33
+1.36
+1.50
+1.51
+1.61
+1.70
+1.77
+1.82
+2.07
+2.87
Increasing strength as reducing agent
*For all half-reactions the concentration is 1 M for dissolved species and the pressure is 1 atm for gases.
These are the standard-state values.
Transcribed Image Text:Table 20.1 Standard reduction potentials at 25°C* Increasing strength as oxidizing agent Half-Reaction Li*(aq) + e K+ (aq) + e Ba²+ (aq) + 2e Sr²+ (aq) + 2e- Ca²+ (aq) + 2e Na + (aq) + e Mg²+ (aq) + 2e Be²+ (aq) + 2e Al³+ (aq) + 3e Mn²+ (aq) + 2e 2H₂O + 2e™ Zn²+ (aq) + 2e- Cr³+ (aq) + 3e Fe²+ (aq) + 2e Cd²+ (aq) + 2e PbSO4(s) + 2e Co²+ (aq) + 2e Ni²+ (aq) + 2e 2+ Sn²+ (aq) + 2e Pb²+ (aq) + 2e Li(s) K(s) Ba(s) → Sr(s) Ca(s) Na(s) Mg(s) Be(s) Al(s) →→ Mn(s) H₂(g) + 2OH(aq) Zn(s) Cr(s) Fe(s) Cd(s) Pb(s) + Co(s) Ni(s) Sn(s) Pb(s) H₂(g) Sn²+ (aq) + SO² (aq) 4+ 2H¹ (aq) + 2e Sn¹+ (aq) + 2e Cu²+ (aq) + e → Cut (aq) SO (aq) + 4H+ (aq) + 2e SO₂(g) + 2H₂O AgCl(s) + e → Ag(s) + Cl(aq) Cu²+ (aq) + 2e Cu(s) O₂(g) + 2H₂O + 4e¯¯ → [₂ (s) + 2e →→→→→→→ 21 (aq) MnO4 (aq) + 2H₂O + 3e - O₂(g) + 2H+ (aq) + 2e¯ Fe²+ (aq) Fe³+ (aq) + e Ag (aq) + e Ag(s) Hg2+ (aq) + 2e 2Hg²+ (aq) + 2e → NO3(aq) + 4H+ (aq) + 3e 2Hg(1) 40H (aq) H₂O₂(aq) + 2H+ (aq) + 2e¯ Co³+ (aq) + e O3(g) + 2H+ (aq) + 2e F₂(g) + 2e →→→ 2F (aq) Hg2+ (aq) MnO₂ (s) + 4OH(aq) H,Oz(aq) Br₂(l) + 2e →→→ 2Br (aq) O₂(g) + 4H+ (aq) + 4e¯ MnO₂ (s) + 4H+ (aq) + 2e → Cr₂O² (aq) + 14H+ (aq) + 6e Cl₂(g) + 2e → Au³+ (aq) + 3e 2C1 (aq) - Au(s) MnO4 (aq) + 8H+ (aq) + Se¯→→→→→ Ce+ (aq) + e Ce ³+ (aq) PbO₂ (s) + 4H+ (aq) + SO² (aq) + 2e¯ 2H₂O O₂(g) + H₂O(l) NO(g) + 2H₂O Co*(aq) 2H₂O Mn²+ (aq) + 2H₂O 2Cr³+ (aq) + 7H₂O 2+ Mn²+ (aq) + 4H₂O -> PbSO4(s) + 2H₂O 8° (V) -3.05. -2.93 -2.90 -2.89 -2.87 -2.71 -2.37 -1.85 -1.66 -1.18 -0.83 -0.76 -0.74 -0.44 -0.40 -0.31 -0.28 -0.25 -0.14 -0.13 0.00 +0.13 +0.15 +0.20 +0.22 +0.34 +0.40 +0.53 +0.59 +0.68 +0.77 +0.80 +0.85 +0.92 +0.96 +1.07 +1.23 +1.23 +1.33 +1.36 +1.50 +1.51 +1.61 +1.70 +1.77 +1.82 +2.07 +2.87 Increasing strength as reducing agent *For all half-reactions the concentration is 1 M for dissolved species and the pressure is 1 atm for gases. These are the standard-state values.
2. Calculate AGº and Kc for the following reaction at 298K:
Br₂(1) + 21 (aq)
(R:8.314J/mol.K, 96500 J/V.mol)
2Br (aq) + I₂(s)
Transcribed Image Text:2. Calculate AGº and Kc for the following reaction at 298K: Br₂(1) + 21 (aq) (R:8.314J/mol.K, 96500 J/V.mol) 2Br (aq) + I₂(s)
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