3. Magnesium hydroxide dissolves in acidic somution according to the following balanced equation: (10)

Mg(OH)2 (s) + 2H+ (aq) ---> Mg2+ (aq) + 2H2O(l)

a. use the data in the chart (Appendix C - i have attached all the values) to calculate gibbs free energy at 25 degrees C. Note that for Mg2+ (aq), gibbs free energy = -454.8kJ/mol.

b. determine the equilibrium constant for this reaction at 25 degrees C.

Appendix CH=kj/molGKj/molS0=jg/mdh H0=924.7C=833.7s=63.24Mg(OH)2(s) H(aq)++ H=06=0s=0 G0=454.8kJ/molMg21(aq) H2O t=285.836=273.13S2=69.91