The Acid Dissociation Constant for a Weak Acid HX at 27°C

question 63

Multiple Choice

The acid dissociation constant for a weak acid HX at 27°C is 3.96 × 10^-8. Calculate the free energy of formation for X^-(aq) at 27°C. The standard free energies of HX(aq) and H⁺(aq) at 27°C are -317.2 kJ/mol and 0, respectively.

• A) -360 kJ/mol
• B) -299 kJ/mol
• C) -2751 kJ/mol
• D) 275 kJ/mol
• E) 360 kJ/mol

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