Explain grams of calcium carbonate

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Question about Extraction of caffeine from tea

Why is sodium chloride added to the tea solution before extracting with ethyl acetate? 4 grams of calcium carbonate was added to 90 ml's of water in a flask, then was boiled and poured over tea bags. After squeezing out the liquid sodium chloride was added to this solution I need to know why.

Reference no: EM13130432

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