Pipette 50 ml sample into a 250 ml Erlenmeyer flask.

Add 3 drops of alcoholic Phenolphthalein indicator into sample.

Ensure complete mixing.

Titrate sample using Sodium Hydroxide solution.

Endpoint is a persisting pink coloration.

Repeat the steps for blank using distilled water instead of sample.

Calculate Acidity using volume of NaOH titrant.

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