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2 Al + 2 NaOH + 2 H 2 O → 2 NaAlO 2 + 3 H 2 Sodium aluminate is an inorganic chemical that is used as an effective source of aluminium hydroxide for many industrial and technical applications. Pure sodium aluminate (anhydrous) is a white crystalline solid having a formula variously given as NaAlO 2 , Na 3 AlO 3 , Na[Al(OH) 4 ] , Na 2 O·Al 2 ...
Many of them are hygroscopic. Organic compounds. Chemical formula Name CAS number CH 3 CHO: acetaldehyde: 75-07-0 CH 3 CO 2 H: acetic acid: 64-19-7 (CH 3) 2 CO ...
Both NaOH and KOH are also used in the production of soap and detergents (saponification). Due to their hygroscopic properties, alkali hydroxides are used as desiccants. They also readily absorb carbon dioxide and are therefore used in carbon dioxide scrubbers. [2]
The volume of a particular material or compound is affected by ambient moisture and may be considered its coefficient of hygroscopic expansion (CHE) (also referred to as CME, or coefficient of moisture expansion) or the coefficient of hygroscopic contraction (CHC)—the difference between the two terms being a difference in sign convention.
Name General Description Acetic acid: an organic acid; is one of the simplest carboxylic acids: Acetone: an organic compound; simplest example of the ketones: Acetylene: a hydrocarbon and the simplest alkyne; widely used as a fuel and chemical building block
2 SiO 3, which is the main component of commercial sodium silicate solutions. It is an ionic compound consisting of sodium cations Na + and the polymeric metasilicate anions [– SiO 2− 3 –] n. It is a colorless crystalline hygroscopic and deliquescent solid, soluble in water (giving an alkaline solution) but not in alcohols. [1]
In industry, the various grades of sodium silicate are characterized by their SiO 2:Na 2 O weight ratio (which can be converted to molar ratio by multiplication with 1.032). The ratio can vary between 1:2 and 3.75:1. [1] Grades with ratio below 2.85:1 are termed alkaline. Those with a higher SiO 2:Na 2 O ratio are described as neutral.
If NaOH is clearly deficient in the system under consideration (soda lime or alkali-silica reaction), it is formally possible to write the same reactions sets by simply replacing the CO 3 2-anions by HCO 3 − and the SiO 3 2-anions by HSiO 3 −, the principle of catalysis remaining the same, even if the number of intermediate species differs.