For CaF 2 (s) Ca 2+ (aq) + 2 F (aq), K = 3.9 10
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For CaF2(s) ⇌ Ca2+(aq) + 2 F−(aq), K = 3.9 ×10−11 at 25°C and the standard Gibbs energy of formation of CaF2(s) is −1167 kJ mol−1. Calculate the standard Gibbs energy of formation of CaF2(aq).
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