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Explain the principle of EDTA method.
written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.9 years ago

Mumbai University > First Year Engineering > Sem1 > Applied Chemistry 1

Marks: 3M

Year: Dec 2014
engineering chemistry
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written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k

EDTA stands for Ethylene Diamine Tetra Acetic acid. As it is insoluble in water, we use its disodium salt.

Structure of EDTA:

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By nature, Eriochrome Black T indicator is blue in colour. When EBT indicator is added to water sample, it forms a wine red coloured unstable Ca-Mg-EBT complex.

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