Question #63247
Were were estimating dissolved CO2 in water by American Public Health Association method. It was a Titrimetric Method using phenolpthalein indicator.

Titrant used was NaOH and analyte was sample water.

Our instructor said that on adding phenolpthalein if the water sample turns pink then it can be concluded that no free CO2 is present. But how's it so?
1
Expert's answer
2016-11-12T10:18:10-0500
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