Potassium Hydroxide in Ethanol (60%) VS

Potassium hydroxide in alcohol (60% v/v)

For a 0.5m solution Dissolve 3 g of potassium hydroxide R in aldehyde-free alcohol R (60 per cent V/V) and dilute to 100.0 mL with the same solvent.

Standardisation Dissolve 0.500 g of benzoic acid RV in 10 mL of water R and 40 mL of ethanol (96 per cent) R. Titrate with the potassium hydroxide solution, determining the end-point potentiometrically (2.2.20) or using 0.1 mL of phenolphthalein solution R as indicator.

1 mL of 0.5 M potassium hydroxide in alcohol (60 per cent V/V) is equivalent to 61.06 mg of C₇H₆O₂.