you were unable to complete the 3rd Trial and stored your KMnO4 solution in your desk for 3 days before completing the 3rd titration with the stored solution?

It seems like you're asking what would happen if you stored a KMnO4 solution for 3 days before using it in a titration.

Potassium permanganate (KMnO4) is a strong oxidizing agent, and its solution can decompose over time, especially if exposed to light or heat. This could potentially affect the concentration of the solution and therefore the accuracy of your titration results.

Here are the steps you should take:

1. Store the KMnO4 solution in a cool, dark place to slow down the decomposition process.
2. Before using the stored solution, check for any visible changes. If the solution has turned from purple to green or brown, it has likely decomposed and should not be used.
3. If no changes are visible, you can proceed with the titration. However, keep in mind that the results may not be as accurate as they would be with a fresh solution.
4. After the titration, compare the results with those from the previous trials. If the results are significantly different, it may be due to the age of the KMnO4 solution.

In general, it's best to prepare a fresh KMnO4 solution for each titration to ensure the most accurate results.