The problem is that I am given the dissociation of a weak acid HA with a Ka value of 4.5x10^-7 in water. Thus, the equation would look like HA⇔[H+]+A-. I am asked to calculate delta G (in kJ) for this reaction at 25 degrees celcius.
I know I should use this equation, deltaG=-RTlnK
I do not understand what K would equal?
Thank you.