Preparation and Standardization of 0.5 M Potassium Hydroxide in Ethanol (60 %)

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