How to Prepare 0.5 N Alcoholic KOH Solution?

Prepare 0.5 N Alcoholic KOH Solution

Dissolve 14 gm of KOH Flasks (Potash Alkali) in 200 ml of distilled water in a 500 ml volumetric flask. After complete dissolution make up to mark 500 ml with distilled water.

Standardization of 0.5N KOH Solution

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Transfer 10 ml KOH solution by pipette to a 100 ml volumetric flask, filling the flask up to the mark with distilled water. Take this solution in a burette.

Pipette 25 ml of standard 0.1N oxalic acid solution into a 100 ml conical flask. Titrate with the KOH solution using Phenolphthalein as an indicator.
 
End Point - Colorless to Violet
 
Normality of original in KOH solution = 10x25x0.1= 25
                                                                                     Vb 
Vb = Volume of KOH Solution

PREPARATION OF 0.5 N OF Aqueous KOH SOLUTION

Dissolve 14 gm of KOH Flasks (Potash Alkali) in 200 ml of distilled water in a 500 ml volumetric flask. After complete dissolution make up to mark with distilled water.

STANDARDIZATION OF KOH SOLUTION

Transfer 10 ml KOH solution by a pipette to a 100 ml volumetric flask and make up the volume to the mark with distilled water. Take this solution in a burette.

Pipette out 25ml of standard 0.1N oxalic acid solution and transfer into a 100ml conical flask. Titrate with the KOH solution using Phenolphthalein as an indicator.
 
End Point - Colourless to Voilet
 
Normality of original in KOH solution  = 10x25x0.1= 25
                                                                                       Vb         
Vb = Volume of KOH Solution