Preparation of 0.1 N Perchloric Acid in Glacial Acetic Acid
Introduction
Perchloric acid is a strong acid that is widely used in various analytical and laboratory applications. When diluted with glacial acetic acid, it becomes a suitable solvent for various chemical reactions and extractions. In this article, we will discuss the preparation of 0.1 N perchloric acid in glacial acetic acid.
Materials Required
- Perchloric acid (HClO4) - 70%
- Glacial acetic acid (CH3COOH)
- Distilled water
- Glassware and equipment for measuring and mixing
Preparation
Step 1: Preparation of Stock Solution
- Weigh 8.5 mL of 70% perchloric acid (HClO4) into a beaker.
- Add 50 mL of distilled water to the beaker and mix well.
- This will give you a stock solution of approximately 1 N perchloric acid.
Step 2: Preparation of 0.1 N Perchloric Acid in Glacial Acetic Acid
- Measure 10 mL of the stock solution prepared in Step 1 into a 100 mL volumetric flask.
- Add 90 mL of glacial acetic acid (CH3COOH) to the flask.
- Mix well to ensure complete dissolution.
Step 3: Standardization (Optional)
- If required, standardize the prepared 0.1 N perchloric acid in glacial acetic acid using a strong base like sodium hydroxide (NaOH) or potassium hydroxide (KOH).
- Titrate the prepared solution with the strong base until the endpoint is reached, and calculate the normality of the perchloric acid solution.
Precautions and Handling
- Handle perchloric acid with caution, as it is a strong oxidizing agent and can cause skin and eye irritation.
- Wear protective gloves, goggles, and lab coats when handling the acid.
- Always prepare the solution in a fume hood and ensure proper ventilation.
Conclusion
The preparation of 0.1 N perchloric acid in glacial acetic acid is a simple and straightforward process. By following the steps outlined above, you can prepare a solution that is suitable for various laboratory applications. Remember to handle the acid with caution and follow all necessary safety protocols to avoid accidents.
