The answer said:
27.When the titrant is added to the solution, the solution will become slightly purple for a brief instant, until the ferrous cation (Fe2+ (aq)) consumes the permanganate anion (MnO^fa^) and returns to being a clear solution with a small amount of brown precipitate falling out of solution. The endpoint of titration occurs when the initially clear ferrous solution turns and remains purple because of the unreacted excess permanganate that remains in solution following the complete oxidation of Fe2+ by Mn04" (KMn04 is the oxidizing agent). MnO is a solid, so the solution does not turn brown, but a brown precipitate forms on the bottom of the flask. This eliminates choices A and B. Over-titration with KMnO^aq) results in the purple color remaining in solution. It turns clear only if the KMn04 reacts. The lingering of the purple color indicates that the reaction is complete. Choice D is clearly (or more so purply) the best answer.
Does this mean that at the equivalence point, the reactants and products are at equilibrium, and the end point is where there is more reactant than products?
27.When the titrant is added to the solution, the solution will become slightly purple for a brief instant, until the ferrous cation (Fe2+ (aq)) consumes the permanganate anion (MnO^fa^) and returns to being a clear solution with a small amount of brown precipitate falling out of solution. The endpoint of titration occurs when the initially clear ferrous solution turns and remains purple because of the unreacted excess permanganate that remains in solution following the complete oxidation of Fe2+ by Mn04" (KMn04 is the oxidizing agent). MnO is a solid, so the solution does not turn brown, but a brown precipitate forms on the bottom of the flask. This eliminates choices A and B. Over-titration with KMnO^aq) results in the purple color remaining in solution. It turns clear only if the KMn04 reacts. The lingering of the purple color indicates that the reaction is complete. Choice D is clearly (or more so purply) the best answer.
Does this mean that at the equivalence point, the reactants and products are at equilibrium, and the end point is where there is more reactant than products?
