Problem 1
Calculate activity coefficients for the following ions at the indicated ionic strengths using the Davies equation:
Ca2+ and Cl-; I = 0.06 M
Al3+ and AlOH2+; I = 0.075 M
Problem 2
What is the activity of water in a solution if the vapor pressure of water above the solution is 80% of the vapor pressure of pure water? If the mole fraction of water in this solution is 0.95, what is the activity coefficient for the water?
Problem 3
What assumptions does Essington make when equating Kdiss with Ksp? Under what conditions would these assumptions not be valid?
I took gen chem 3 years ago and i have no idea with these questions..