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Understanding the Molar Mass of NaFeEDTA·3H₂O: A Key Compound in Chemistry

Introduction
The molar mass of a compound is crucial for various scientific applications, including chemical reactions, laboratory preparations, and industrial processes. One such compound, NaFeEDTA·3H₂O (sodium iron(III) ethylenediaminetetraacetate trihydrate), is widely used in analytical chemistry, medicine, and agriculture. Calculating its molar mass accurately ensures precise formulations and effective utilization.

What is NaFeEDTA·3H₂O?
NaFeEDTA is a chelating agent where iron (Fe³⁺) is bound to EDTA (ethylenediaminetetraacetic acid), with sodium (Na⁺) as a counterion and three water molecules (3H₂O) in its hydrated form. It is commonly used as an iron supplement and in buffer solutions.

Calculating the Molar Mass of NaFeEDTA·3H₂O
To determine the molar mass, we sum the atomic masses of all constituent atoms:
– Sodium (Na): 22.99 g/mol
– Iron (Fe): 55.85 g/mol
– EDTA (C₁₀H₁₂N₂O₈): (10 × 12.01) + (12 × 1.01) + (2 × 14.01) + (8 × 16.00) = 292.24 g/mol
– Water (3H₂O): 3 × [(2 × 1.01) + 16.00] = 54.06 g/mol

Total Molar Mass:
22.99 (Na) + 55.85 (Fe) + 292.24 (EDTA) + 54.06 (3H₂O) = 425.14 g/mol

Applications of NaFeEDTA·3H₂O
1. Nutritional Supplements: Used to treat iron deficiency due to its high bioavailability.
2. Agriculture: Acts as a micronutrient in fertilizers to prevent iron chlorosis in plants.
3. Laboratory Use: Serves as a standard in complexometric titrations and metal ion analysis.

Conclusion
The molar mass of NaFeEDTA·3H₂O (425.14 g/mol) is essential for accurate dosing and formulation in scientific and industrial applications. Understanding its composition ensures proper usage in medicine, agriculture, and chemical research.