Directions: In the following questions, A statement of Assertion (A) ...
When a solution of chelating ligand is added to solution containing toxic metal ligands chelates the metal ions by formation of stable complex.
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Directions: In the following questions, A statement of Assertion (A) ...
Explanation:
Assertion (A): Toxic metal ions are removed by the chelating ligands.
Reason (R): Chelate complexes tend to be more stable.
The correct answer is option 'A' - Both A and R are true and R is the correct explanation of A.
Explanation:
Chelating ligands are molecules that have multiple electron donating atoms such as nitrogen, oxygen or sulfur, which can coordinate with a metal ion. Coordination of a metal ion to a chelating ligand results in the formation of a chelate complex. These complexes are more stable than non-chelated complexes because the chelate ligand forms multiple bonds with the metal ion, which prevents it from interacting with other molecules in the solution. Due to this stability, chelating ligands are used to remove toxic metal ions from the environment or from biological systems. For example, EDTA (ethylene diamine tetraacetic acid) is a chelating ligand that is commonly used in water treatment to remove metal ions such as lead, mercury, and cadmium. The EDTA forms a stable complex with the metal ion, which can then be removed from the water by precipitation or filtration. Therefore, the reason is a correct explanation of the assertion.