Chemistry, asked by kittu7217, 1 year ago

Why calcium ions cannot be directly titrated with edta using ebt as indicator?

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Answered by indrani143aishu

Eriochrome Black T is a complexometric indicator that is used in complexometric titrations, e.g. in the water hardness determination process. ... In its protonated form, Eriochrome Black T is blue. It turns red when it forms a complex with calcium, magnesium, or other metal ions.

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