Use the reaction to answer the question.

Question

3MnO (aq) + 4H (aq) ⇄ 2MnO (aq) + 2H O(l) + MnO (s)
In this reaction, MnO ions are green and MnO ions are purple.
Which substance, when added to the solution, would make the solution more purple?
(1 point)
4
2– +
4
–
2 2
4
2–
4
–
MnO ions 4
2–
MnO2
H2O
MnO ions

Answer 1

To increase the concentration of MnO ions (which are purple), you would want to shift the equilibrium to the right in the given reaction:

\[ 3MnO^{2-} (aq) + 4H^+ (aq) ⇄ 2MnO^{4-} (aq) + 2H_2O(l) + MnO(s) \]

Adding MnO ions (MnO²⁻) to the solution would increase the amount of these ions and shift the equilibrium toward the products, producing more MnO, which is purple.

Thus, the answer to your question is: MnO ions (MnO²⁻).