Sodium Hydroxide - NaOH

What is Sodium Hydroxide?

Sodium Hydroxide is a solid ionic compound. It is also known as caustic soda, Iye, sodium hydrate or soda lye. It is a co product of chlorine production. In its pure form it is crystalline solid, colorless in nature. This compound is highly water soluble and consists of sodium cations and hydroxide anions. NaOH absorbs moisture from the air. It is highly corrosive and can cause severe skin burn and irritation to eyes and other body parts. It generates high level of heat and so is always created by mixing the compound into water not not the vice versa. In cosmetics, this inorganic compound is used as a buffering agent. It can also control the PH levels. The PH of sodium chloride is 13.

Properties of Sodium Hydroxide – NaOH

NaOH Sodium Hydroxide
Molecular Weight/ Molar Mass 39.997 g/mol
Density 2.13 g/cm³
Boiling Point 1,388 °C
Melting Point 318 °C

Sodium Hydroxide structure – NaOH

Sodium Hydroxide structure

NaOH Uses (Sodium Hydroxide)

  • It is used in manufacturing of detergents and soaps
  • It is used in the production of bleach like chlorine
  • It is used in drain cleaners
  • It is used in removal of heavy metals from the water by the municipal water treatment facility
  • It is used in food preservatives to prevent bacteria and mold growth
  • It is used for canning
  • It is used in paper making and paper recycling process

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Learn more about the Structure and properties of NaOH from the experts at BYJU’S.

Practise This Question

Which of the following is an oxidising agent in 2Mg+O2(g)2MgO(s)