Sodium Acetate Formula, Molar Mass, and Uses

Sodium acetate is a chemical compound that finds its applications in various industries. It is formula, molar mass, and uses make it a key component in many products and processes.

Sodium acetate is represented by the chemical formula CH3COONa. This formula indicates that sodium acetate consists of sodium ions (Na+) and acetate ions (CH3COO-). The presence of the acetate group, composed of two carbon atoms, three hydrogen atoms, and two oxygen atoms.

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Calculating Sodium Acetate Molar Mass 

To determine the molar mass of sodium acetate, the atomic masses of constituent elements need to be considered. 

The atomic mass of carbon (C) is 12.01 g/mol, the atomic mass of hydrogen (H) is 1.008 g/mol, the atomic mass of oxygen (O) is 16.00 g/mol, and the atomic mass of sodium (Na) is 22.99 g. mass of /mol.

Sodium Acetate Formula, Molar Mass, and Uses

Calculate the molar mass of sodium acetate by adding the atomic masses of each element in the formula.

= (2 × C) + (4 × H) + (2 × O) + Na

 = (2 × 12.01) + (4 × 1.008) + (2 × 16.00) + 22.99 

= 82.03 g/mol

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Uses of Sodium Acetate

Sodium acetate finds wide use in various industries and applications due to its unique properties. 

  1. Sodium acetate is used as a food preservative and flavor enhancer.
  2. It is used in the chemical industry in the production of dyes, pharmaceuticals, and perfumes.
  3. Sodium acetate is a key ingredient in disposable heat packs. These packs can be heated and reused multiple times by triggering a crystallization process that releases heat when needed.
  4. It is commonly used as a buffer solution in laboratories. And it helps maintain a stable pH level.
  5. It is used as a mordant in the textile industry.
  6. Sodium acetate is sometimes added to the concrete mix to improve setting time and reduce the risk of cracking.
  7. It is used in some medical treatments to correct electrolyte imbalances and restore pH levels.

Sodium Acetate Trihydrate: Formula, Properties, and Applications

Sodium acetate trihydrate is a hydrated form of sodium acetate, a compound widely used in various industries.

Sodium Acetate Trihydrate Formula

The formula of sodium acetate trihydrate is NaCH3COO·3H2O. This indicates that each sodium acetate molecule is associated with three water molecules, resulting in a total of 5 atoms of hydrogen, 3 atoms of oxygen, 1 atom of carbon, and 1 atom of sodium in the formula. 

Properties of Sodium Acetate Trihydrate

Sodium acetate trihydrate exhibits many unique properties due to its crystal structure and water content. 

  • Sodium acetate trihydrate has a hygroscopic nature.
  • The boiling point of the trihydrate is around 123°C (253°F).
  • The melting point of sodium acetate trihydrate is approximately 58°C (136°F).
  • Sodium acetate trihydrate is a slightly alkaline substance with a pH value of around 9.
  • It is highly soluble in water.

Applications of Sodium Acetate Trihydrate

It has wide application in various industries. Below are some notable uses.

1. Heat Packs and Hand Warmers: These are commonly used in heat packs and hand warmers. By triggering a crystallization process through a physical disturbance, such as clicking on a metal disc or turning the pack, it releases stored heat, providing warmth in cold conditions.

2. pH Adjuster and Buffer: They are used as pH adjusters and buffer solutions in various laboratory experiments and industrial processes. This helps maintain a stable pH level, ensuring precise and controlled reactions.

3. Textile and Dye Industry: It serves as a mordant in the textile and dye industries. It increases the absorption of dyes into the fibers.

5. Food Additive: It is used as a food additive, especially in the production of processed meats and snacks. It acts as a preservative.

6. Concrete Accelerator: Sodium acetate trihydrate is sometimes added to concrete mixtures to accelerate the setting process and enhance the strength of the final product.


Sodium acetate trihydrate, with its formula NaCH3COO·3H2O, possesses distinct properties and finds versatile applications in several industries. Its hygroscopic nature, pH adjuster capabilities, and role as a mordant make it an essential compound in heat packs, laboratory experiments, textile dyeing, and food preservation. Additionally, sodium acetate trihydrate contributes to chemical synthesis and serves as a concrete accelerator.

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