Al2(SO4)3 (aq) + KIO3 (aq) + 5 KI (aq)3 H2O (ℓ) → 2 Al(OH)3 (s) + 3 I2 (s) + 3 K2SO4 (aq)

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Stoichiometry

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Al2(SO4)3      Mass: g  or Solution Volume: mL of Concentration: mol/L
KIO3           Mass: g  or Solution Volume: mL of Concentration: mol/L
KI             Mass: g  or Solution Volume: mL of Concentration: mol/L
H2O            Mass: g
Al(OH)3        Mass: g
I2             Mass: g
K2SO4          Mass: g
Heat Released: kJ

Enthalpy of Reaction

[2ΔHf(Al(OH)3 (s)) + 3ΔHf(I2 (s)) + 3ΔHf(K2SO4 (aq))] - [1ΔHf(Al2(SO4)3 (aq)) + 1ΔHf(KIO3 (aq)) + 5ΔHf(KI (aq)) + 3ΔHf(H2O (ℓ))]
[2(-1284.49) + 3(0) + 3(-1414.07)] - [1(-3790.55) + 1(-473.73) + 5(-307.59) + 3(-285.83)] = -151.469999999999 kJ
-151.47 kJ     (exothermic)

Entropy Change

[2ΔSf(Al(OH)3 (s)) + 3ΔSf(I2 (s)) + 3ΔSf(K2SO4 (aq))] - [1ΔSf(Al2(SO4)3 (aq)) + 1ΔSf(KIO3 (aq)) + 5ΔSf(KI (aq)) + 3ΔSf(H2O (ℓ))]
[2(71.13) + 3(116.14) + 3(225.08)] - [1(-583.26) + 1(220.91) + 5(213.79) + 3(69.91)] = 249.59 J/K
249.59 J/K     (increase in entropy)

Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[2ΔGf(Al(OH)3 (s)) + 3ΔGf(I2 (s)) + 3ΔGf(K2SO4 (aq))] - [1ΔGf(Al2(SO4)3 (aq)) + 1ΔGf(KIO3 (aq)) + 5ΔGf(KI (aq)) + 3ΔGf(H2O (ℓ))]
[2(-1305.83) + 3(0) + 3(-1311.23)] - [1(-3204.57) + 1(-411.33) + 5(-334.89) + 3(-237.18)] = -543.460000000001 kJ
-543.46 kJ     (spontaneous)

From ΔG = ΔH - TΔS:
-225.89 kJ     (spontaneous)

Equilibrium Constant, K (at 298.15 K)

1.6419901627e+095
This process is favorable at 25°C.