Ca(IO3)2 (s) → Ca+2 (aq) + 2 IO3-1 (aq)

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Reaction Type:

Dissociation of an ionic compound in water

Entropy Change

[1ΔSf(Ca+2 (aq)) + 2ΔSf(IO3-1 (aq))] - [1ΔSf(Ca(IO3)2 (s))]
[1(-53.14) + 2(118.41)] - [1(230.12)] = -46.44 J/K
-46.44 J/K     (decrease in entropy)

Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[1ΔGf(Ca+2 (aq)) + 2ΔGf(IO3-1 (aq))] - [1ΔGf(Ca(IO3)2 (s))]
[1(-553.54) + 2(-128.03)] - [1(-839.31)] = 29.71 kJ
29.71 kJ     (nonspontaneous)

From ΔG = ΔH - TΔS:
30.85 kJ     (nonspontaneous)

Equilibrium Constant, K (at 298.15 K)

6.2336665978e-006
This process is not favorable at 25°C.

Enter an initial concentration for the ionic compound. Upon hitting submit, Ksp (6.2336665978e-006) will be used to calculate the equilibrium concentration for all species.

Ca(IO3)2 Ca+2 IO3-1
Initial M   0 0
Change -x +x +2x
Equilibrium