V Exercise 8.14. The very small value of K is consistent with a negative voltage. The reaction is not spontaneous written as a dissolution reaction. Chapter 10 Concept Review problem 6. As in any equilibrium, reactants and products, such as a precipitate and ions in solution, continue to interconvert on the microscopic level.
Gravimetric analysis assumes that the precipitate is in one form.
All of the barium precipitate would now be in the form of BaSO 4 and the analysis would be accurate.