Preparation and standardisation of 0.5 M Potassium Hydroxide in 60 % ethanol using Hydrochloric Acid and Phenolphthalein solution as indicator used in pharmaceutical analysis.
Potassium Hydroxide in Ethanol Solution Preparation
- Dissolve 30 g of potassium hydroxide in sufficient ethanol (60 %) to produce 1000 ml.
- Standardize the solution in the following manner.
Potassium Hydroxide in Ethanol Solution Standardization
- Pipette 20.0 ml of standardize 0.5 M hydrochloric acid into a flask.
- Add 0.1 ml of phenolphthalein solution.
- Titrate with the ethanolic potassium hydroxide solution until the permanent pale-pink color is produced.
- 1 ml of 0.5 M hydrochloric acid is equivalent to 0.02806 g of KOH.
Also see:
Determination of Shelf Life of Solutions in Laboratory
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