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Calculate Molar Mass Of Oxalic Acid

Oxalic Acid Molecular Formula:

\[ C_2H_2O_4 \]

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1. What is Oxalic Acid?

Oxalic acid is a dicarboxylic acid with the formula C₂H₂O₄. It occurs naturally in many plants and vegetables and is used in various industrial processes including cleaning, bleaching, and as a reagent in analytical chemistry.

2. How is Molar Mass Calculated?

The molar mass is calculated by summing the atomic masses of all atoms in the molecule:

For anhydrous oxalic acid (C₂H₂O₄):
MW = (2 × C) + (2 × H) + (4 × O)
MW = (2 × 12.01) + (2 × 1.008) + (4 × 16.00) = 90.03 g/mol
For oxalic acid dihydrate (C₂H₂O₄·2H₂O):
MW = (2 × C) + (2 × H) + (4 × O) + (4 × H) + (2 × O)
MW = (2 × 12.01) + (6 × 1.008) + (6 × 16.00) = 126.07 g/mol

3. Applications of Oxalic Acid

Details: Oxalic acid is used as a bleaching agent, in rust removal, as a mordant in dyeing processes, and as a standard in analytical chemistry for standardizing potassium permanganate solutions.

4. Using the Calculator

Tips: Select whether you want to calculate the molar mass of anhydrous oxalic acid or the dihydrate form. The calculator will automatically compute the result based on standard atomic weights.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between anhydrous and dihydrate oxalic acid?
A: Anhydrous oxalic acid contains no water molecules, while the dihydrate form (C₂H₂O₄·2H₂O) contains two water molecules per molecule of oxalic acid.

Q2: Why are there different forms of oxalic acid?
A: Oxalic acid can crystallize with or without water molecules depending on the crystallization conditions. The dihydrate form is more common commercially.

Q3: Is oxalic acid dangerous?
A: Yes, oxalic acid is toxic and corrosive. Proper safety precautions should be taken when handling it, including wearing protective equipment.

Q4: What are the common uses of oxalic acid?
A: It's used for cleaning, bleaching, rust removal, and as a reagent in analytical chemistry and various industrial processes.

Q5: How should oxalic acid be stored?
A: Oxalic acid should be stored in a cool, dry place in a tightly sealed container, away from moisture and incompatible materials.

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