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https://www.youtube.com/watch?v=MKLi-V0CY9M

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Sodium hydroxide reacts with protic acids to produce water and the corresponding salts

Sodium hydroxide also reacts with acidic oxides, such as sulfur dioxide.

Sodium hydroxide can be used for the base-driven hydrolysis of esters,  amides and alkyl halides.

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Warning! Sodium Hydroxide is caustic and will cause burns to your skin. It has a PH level of around PH11. When handling this take extreme caution.

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Melting Point:  318'C, 604'F

Boiling Point: 1388'C, 2530'F

Density: 2.13 g/cm³

Pure sodium hydroxide is a colorless crystalline solid that melts at 318 °C

highly soluble in water, with a lower solubility in ethanol and methanol

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Sodium Hydroxide does not occur naturally, but the compound  is  very inexpensive to to make. It is usually produced in a 50% solution through the electrolysis of Sodium Chloride during which Chlorine Gas is also produced. The water can then be evaporated from the solution to obtain the compound in the form of a solid.

Formula - Ca(OH)2 + Na2CO3 → CaCO3 + 2 NaOH

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Sodium hydroxide is strongly irritating and corrosive. It can cause severe burns and permanent damage to any tissue that it comes in contact with.Sodium hydroxide can cause hydrolysis of proteins, and hence can cause burns in the eyes which may lead to permanent eye damage.

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Used in processes to make products including plastics, soaps rayon and

textiles

Revitalizing acids in petroleum refining

Removal of paint

Etching aluminum

Dehorning of cattle

During two steps of the paper making process

Used in relaxers to help straighten hair (no longer commonly used because it can cause chemical burns)

Used in steps for peeling fruits and vegetables, processing cocoa and chocolate, thickening of ice cream, poultry scalding and soda processing

Olives are soaked in Sodium Hydroxide along with other substances to make them black, and soft pretzels are also coated with the compound to give them a chewy texture

Unclogging drains

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Due to its low cost and availability, it has been used to dispose of corpses by criminals. Italian serial killer Leonarda Ciancuilli used this chemical to turn dead bodies into soap. In Mexico, a man who worked for drug cartels admitted disposing of over 300 bodies with it. Sodium hydroxide is a dangerous chemical due to its ability to hydrolyze protein

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The use of Sodium Hydroxide throughout history and today(it has many more uses today) is for soap. The first evidence of this was in a Arabian book in the 13th century. This book was created by a king of Yemen. Later Europeans started using this method to make soap. As a result of this Nicholas Leblanc a French chemist patented a method of making sodium rich and impure sodium carbonate. This is created when soap is created as a byproduct.

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As shown in the picture below Sodium Hydroxide is held together by Ionic and Covalent bonds. Oxygen and Hydrogen share a Covalent bond. Sodium and Oxygen share a Ionic bond.

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Chemical Formula = NaOH

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Sodium Hydroxide was discovered by a English chemist called Humphrey Day in 1807. Besides this not much else is know about his experiments. After its discovery it was called a fixes alkali for a few years after its discovery. Not much else is known besides that molten Sodium Hydroxide was used in the discovery of Sodium.

Sodium Hydroxide has a interesting origin for its name. However not under the name Sodium Hydroxide but under lye. This is the oldest name for Sodium Hydroxide and lye means "wash stuff" in old English . This was a term used from the 13th century meaning strong soap.

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The compound Sodium Hydroxide has many other names. This is mainly because it's is inorganic and man made. The names are
Caustic soda
Lye
Ascarite

White caustic
SodiumHydrate