7. Calculate the hydroxide ion concentration in solution at 25°C in which the pOH is (a) 4.91, (b) 9.03, and (c) 10.55. Determine the pH for at least one of these.
8. Write an equation for the dissociation of HNO3:
a. Will this acid fully dissociate?
b. What is the pH of a 0.33 M solution of HNO3?
c. Is this solution neutral, acidic or basic?
9. Write an equation for the dissociation of KOH:
a. Will this base fully dissociate?
b. What is the pH of 0.0347 M KOH?
c. Is the solution neutral, acidic, or basic?
10. Write an equation for the dissociation of CH3COOH (acetic acid) in water.
a. Is this a strong acid or a weak acid?
b. Calculate the pH of a 0.10 M solution of CH3COOH given that the Ka for its dissociation is 1.8 x 10^-5. Set up an ICE chart and an equilibrium expression in order to do your calculations. Assume you can use an approximation in your work.
c. Perform a calculation showing that your approximation is valid by providing a specific percent.