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 Hydrochloric acid solution.

Endpoint is a disappearance of pink color.

Add 2 drops of Methyl Red indicator into solution.

Titrate again with acid standard until there is color change.

Calculate Alkalinity using volume of HCL titrant used.


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