The Acid Dissociation Constant for a Weak Acid HX at 25°C

question 10

Multiple Choice

The acid dissociation constant for a weak acid HX at 25°C is 4.3 10^-8.Calculate the free energy of formation for X^-(aq) at 25°C.The standard free energies of HX(aq) and H⁺(aq) at 25°C are -208.3 kJ/mol and 0,respectively.

• A)-205 kJ/mol
• B)250 kJ/mol
• C)0
• D)-166 kJ/mol
• E)-250 kJ/mol

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