Standarisasi Kalium Permanganat dengan Asam Oksalat Metode Titrasi Redoks

Introduction

This tutorial guides you through the process of standardizing potassium permanganate using oxalic acid through a redox titration method. This procedure is essential in analytical chemistry to determine the concentration of potassium permanganate, an important reagent. The steps outlined here will help ensure accuracy in your titration experiments.

Step 1: Prepare Oxalic Acid Solution

• Weigh the required amount of oxalic acid.
• Use an analytical balance for precision.
• For example, you may weigh about 0.1 grams of oxalic acid, depending on your specific requirements.

Step 2: Add Solvent and Acid

• Dissolve the weighed oxalic acid in a suitable solvent, typically distilled water.
• Ensure the solution is homogeneous by stirring well.
• Optionally, add a few drops of sulfuric acid to the solution to enhance the titration process.

Step 3: Heat the Solution

• Gently heat the oxalic acid solution.
• This step facilitates the reaction and improves the solubility of oxalic acid.
• Avoid boiling; maintain a moderate temperature to prevent loss of components.

Step 4: Perform the Titration

• Slowly add potassium permanganate solution to the oxalic acid solution using a burette.
• Swirl the flask continuously to mix the solutions thoroughly.
• Observe the color change; the solution will turn from colorless to a light pink as potassium permanganate is added.

Step 5: Identify the Endpoint

• The endpoint of the titration is reached when a persistent light pink color remains.
• This indicates that all oxalic acid has reacted, and there is excess potassium permanganate in the solution.

Step 6: Calculate the Concentration

• Use the volume of potassium permanganate solution added to calculate its concentration.
• The formula for calculation is:

C1V1 = C2V2

Where:

• C1 = concentration of oxalic acid
• V1 = volume of oxalic acid solution used
• C2 = concentration of potassium permanganate
• V2 = volume of potassium permanganate solution used

Conclusion

In this tutorial, you learned how to standardize potassium permanganate using oxalic acid via redox titration. Key steps include preparing the oxalic acid solution, performing the titration, and calculating the concentration accurately. With practice, this method will become an essential part of your laboratory skills, ensuring reliable results in your analytical chemistry experiments. For further experiments, consider exploring other titration methods or using different indicators for visualizing endpoints.