Preparation of Potassium Permanganate Solution:

Steps for Preparation:

Materials:

\n
1. Potassium permanganate crystals (KMnO₄)
\n
2. Distilled water
\n
3. A 500 mL volumetric flask or a 500 mL beaker
\n
4. A balance to weigh the KMnO₄ crystals
\n
5. A stirring rod or magnetic stirrer
\n

Procedure:

\n
1. Weigh the potassium permanganate: \n
   \n
   • Determine the molarity (M) or mass concentration (g/L) of the solution you need.
   \n
   • For example, if you want a 0.1 M KMnO₄ solution: \n
     \n
     • Molar mass of KMnO₄ = 158.04 g/mol
     \n
     • For 0.1 M solution: 0.1 mol/L × 158.04 g/mol = 15.804 g/L
     \n
     • For 500 mL (0.5 L): 15.804 g/L × 0.5 L = 7.902 g
     \n
     \n
   \n
   \n
\n
2. Dissolve the potassium permanganate: \n
   \n
   • Measure 7.902 g (or the amount appropriate for your concentration) of KMnO₄ using the balance.
   \n
   • Transfer the potassium permanganate crystals into a beaker.
   \n
   • Add a small amount (about 100-200 mL) of distilled water to the beaker.
   \n
   • Stir the mixture using a stirring rod or magnetic stirrer until the KMnO₄ dissolves completely. It may take some time, as potassium permanganate is not very soluble, but with stirring, it should dissolve.
   \n
   \n
\n
3. Transfer to a 500 mL volumetric flask: \n
   \n
   • After the KMnO₄ has dissolved, transfer the solution into a 500 mL volumetric flask.
   \n
   • Rinse the beaker with distilled water and pour the rinsings into the volumetric flask to ensure all of the KMnO₄ is transferred.
   \n
   \n
\n
4. Dilute to volume: \n
   \n
   • Add distilled water to the volumetric flask slowly until the solution reaches the 500 mL mark. Make sure you are at eye level to accurately measure the meniscus.
   \n
   • If you’re using a beaker and not a volumetric flask, ensure you dilute the solution to the correct volume by adding water gradually.
   \n
   \n
\n
5. Mix the solution: \n
   \n
   • Cap the flask and invert it several times to thoroughly mix the solution.
   \n
   \n
\n

Safety Considerations:

\n
• Potassium permanganate is a strong oxidizer and can stain skin, clothes, and surfaces. Wear gloves, goggles, and protective clothing. If the solution is highly concentrated, be cautious when handling it. Ref.
\n

\n
• Potassium Permanganate Solution
\n
• Pack Size: 500mL
\n
• Brand: DLC
\n
• Packed in Bangladesh
\n