Metals can bind to anion and be soluble {chelation}|. Chelometric titration can measure all metals, except sodium, potassium, and lithium. Disodium EDTA at pH 4 to pH 5 chelates metals. Metal is Lewis acid, and ligand is Lewis base. Eriochrome Black T is indicator and goes from red to blue. Adding magnesium EDTA can measure calcium. EGTA titrates calcium. Xylenol is indicator for acid titrations with EDTA.
Physical Sciences>Chemistry>Inorganic>Chemical Bond
5-Chemistry-Inorganic-Chemical Bond
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Date Modified: 2022.0224