. Formic acid is a weak acid found in insect stings. It partially dissociates in water according to the reaction HCHO2 reversible reaction arrow CHO2– + H+. The equilibrium constant describing the dissociation is Ka = . (6 points)

i. If a solution of formic acid contains 0.2 M HCHO2, 0.006 M CHO2–, and 0.006 M H+, what is the Ka of the acid? (4 points)








ii. What is the pH of the solution at the concentrations given? (4 points)




iii. What would happen to the equilibrium position if more CHO2– were added to the solution? (4 points)