What is the sample's alkalinity if the phenolphthalein indicator does not turn the sample pink?

ID documento

ID documento TE105

Data pubblicazione

Data pubblicazione 31/03/2021
Domande
What is the sample's alkalinity if the phenolphthalein indicator does not turn the sample pink?
Sommario
Phenolphthalein alkalinity endpoint from pink to colorless
Risposta
Phenolphthalein alkalinity uses a phenolphthalein indicator that changes from pink to a colorless endpoint. If the sample does not turn pink after adding the indicator, the sample does not have phenolphthalein alkalinity. The sample will also not have any phenolphthalein alkalinity if less than pH 8.3.

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