Problem: Delta G=delta H- T delta SDelta G= -RT ln KspMake there two equations equal to each other. Isolate Ksp in oneside and divide both sides by (-RT)

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We are asked to derive the Ksp expression from the given two reactions: 

ΔG=ΔH- T ΔS

ΔG= -RT ln Ksp


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Delta G=delta H- T delta S

Delta G= -RT ln Ksp


Make there two equations equal to each other. Isolate Ksp in oneside and divide both sides by (-RT)

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