Sodium Carbonate Washing Soda
The washing soda chemical name is sodium carbonate. Pure sodium carbonate is a white, odourless powder that is hygroscopic means it absorbs moisture from the air.
The chemical formula of sodium carbonate is Na2CO3 and its molar mass is 106g/mol. It is an ionic compound- a sodium salt of carbonic acid and is composed of two sodium and one carbonate ion.
Washing soda is hydrated sodium carbonate. The washing soda formula is Na2CO3.10H2O.
In this article, we will study sodium carbonate washing soda in detail.
Properties of Washing Soda
1. Physical Properties
It is present in the form of monohydrated salts (Na2CO3.10H2O), anhydrous salts (Na2CO3), hepta-hydrous salts (Na2CO3.7H2O), and deca-hydrous salts.
Colour - greyish white powder
Taste- alkaline taste
Melting point- 851
Boiling point- decomposes
Density - 2.54
Stability- stable at ordinary temperature and atmospheric conditions, dries out in warm.
2. Chemical Properties
Formation of Washing Soda
This process is used for the manufacturing of washing soda. Here we will study the chemical equation of washing soda.
It consists of four steps-
Purification of Brine
Formation of sodium hydrogen carbonate
Formation of sodium carbonate
Recovery of ammonia
Step1: Purification of Brine
At the first stage, a saturated solution of sodium chloride is prepared which is known as brine.
Brine is concentrated through evaporation. Impurities are removed through precipitation.
Sodium chloride brine is the first purified scaling of downstream process equipment and to prevent the contamination of the final product.
After removing the impurities, brine solution is then filtered and passed through an ammonium tower to dissolve ammonia. After purification, brine is contacted with ammonia gas.
Step 2: Formation of Sodium Hydrogen Carbonate
NH₃(aq) + CO₂(g) + NaCl(aq) +H₂O → NaHCO₃(s) + NH₄Cl(aq)
Step 3: Formation of sodium carbonate:
2NaHCO₃ → Na₂CO₃ + CO₂ + H₂O
Step 4: Recovery of ammonia:
2NH₄Cl + Ca(OH)₂ → 2NH₃ + CaCl₂ + H₂O
Uses of Washing Soda
Used in industries and households as a cleaning agent.
It finds its use in the industries of paper, textiles, soap, and detergent.
It is used in the process of water softening.
It is used in glass production.
It is one of the laundry agents of greatest significance.
Did You Know?
The ashes of burned plants are one common source of washing soda; for this reason, it is often called soda ash.
Light and dense soda ash are typically wrapped in multi-wall paper containers, plastic, or polyethylene lined bags. Covered bottom discharge hopper cars are the most common rail cars used for bulk soda ash.
Sodium carbonate is a brittle, crystalline substance that is susceptible to conveyor equipment breakage. Soda ash produces particles that are micron-sized and require high-efficiency collectors.
Usually, soda ash is processed in a factory for a limited period. As a pile on the floor, it can be packed in bulk and retrieved by a front-end loader or other bulk-handling unit.