Sodium oxide dioxide

Commercial Hquid sodium alumiaates are normally analyzed for total alumiaa and for sodium oxide by titration with ethylene diaminetetraacetic acid [60-00-4] (EDTA) or hydrochloric acid. Further analysis iacludes the determiaation of soluble alumiaa, soluble siHca, total iasoluble material, sodium oxide content, and carbon dioxide. Aluminum and sodium can also be determiaed by emission spectroscopy. The total iasoluble material is determiaed by weighing the ignited residue after extraction of the soluble material with sodium hydroxide. The sodium oxide content is determiaed ia a flame photometer by comparison to proper standards. Carbon dioxide is usually determiaed by the amount evolved, as ia the Underwood method. 

At room temperature, Htde reaction occurs between carbon dioxide and sodium, but burning sodium reacts vigorously. Under controUed conditions, sodium formate or oxalate may be obtained (8,16). On impact, sodium is reported to react explosively with soHd carbon dioxide. In addition to the carbide-forrning reaction, carbon monoxide reacts with sodium at 250—340°C to yield sodium carbonyl, (NaCO) (39,40). Above 1100°C, the temperature of the DeviHe process, carbon monoxide and sodium do not react. Sodium reacts with nitrous oxide to form sodium oxide and bums in nitric oxide to form a mixture of nitrite and hyponitrite. At low temperature, Hquid nitrogen pentoxide reacts with sodium to produce nitrogen dioxide and sodium nitrate. 

Chemical Properties. Anhydrous sodium sulfite is stable in dry air at ambient temperatures or at 100°C, but in moist air it undergoes rapid oxidation to sodium sulfate [7757-82-6]. On heating to 600°C, sodium sulfite disproportionates to sodium sulfate and sodium sulfide [1313-82-2]. Above 900°C, the decomposition products are sodium oxide and sulfur dioxide. At 600°C, it forms sodium sulfide upon reduction with carbon (332). 

A desirable glass melts at a reasonable temperature, is easy to work with, and yet is chemically inert. Such a glass can be prepared by adding a third component that has bonding characteristics intermediate between those of purely ionic sodium oxide and those of purely covalent silicon dioxide. Several different components are used, depending on the properties desired in the glass. 

AH° was found to be 27 kcal. and AS was 27 e.u. The large size of the constant compared with the known dissociation of pure sodium carbonate to sodium oxide and carbon dioxide suggests that NO4"3, or orthonitrate is probably formed when oxide ion is placed into fused nitrates. It may well be that the dissociation reaction for pure nitrate should be written ... 

The preparation of sodium and potassium carbonates.—According to N. N. Beketoff,4 sodium oxide, Na20, is not attacked by carbon dioxide at ordinary temp., but at 400° the two substances unite suddenly and vigorously with incandescence. Carbon dioxide transforms the moist oxide or hydroxide into carbonate. The low solubility of sodium hydrocarbonate enables it to be prepared in a very fair degree of purity, and it is quantitatively converted into equally pure carbonate by... 

Sodium metal is highly reactive, however, and potentially explosive. Because of this, there are two other chemicals in the airbag to get rid of the sodium potassium nitrate (KN03) and silicon dioxide (Si02). First, the sodium reacts with the potassium nitrate to produce potassium oxide (K20), sodium oxide (Na20), and some more nitrogen gas ... 

Oxides of metals in Group 1 of the periodic table, such as potassium and sodium, are also highly reactive, though. It would not be safe to allow these chemicals to remain in the airbag, so the potassium and sodium oxides then react with silicon dioxide (Si02). This reaction forms an alkaline silicate powder. Alkaline silicate, a type of glass, will not burn and the resulting powder is harmless. 

North Carolina kaolin has the following chemical composition silicon dioxide, Si02,46.18% aluminum oxide, A1203, 38.38% water, H20, 13.28% sodium oxide, Na20, 1.22% iron oxide, Fe203,. 57% and magnesium oxide, MgO,. 42%. 

Other oxides such as sodium oxide, potassium oxide, and lead oxide are fluxes. They lower the melting point of the silicon dioxide. 

Materials. The titanium dioxide powders were rutile in structure (obtained from the Titanium Division, National Lead Co., Amboy, N. J.), with nominal specific surface areas of 10 and of 100 sq. meters per gram. Chemical analysis by the supplier showed negligible impurities except for 0.8% sodium oxide in the Ti02-100 and traces of iron in both the TiO2-10 and the TiO2-100. The presence of iron was confirmed by the nature of the decay of the neutron irradiation—induced radioactivities. 

Na20(s) + 2Fe(s) The sodium oxide then reacts with carbon dioxide and water vapour. 

Assay for Silicon Dioxide and Sodium Oxide Not less than 90.0% and not more than 110.0% of the percents claimed on the label. 

SYNS DISODIUM dioxide disodium peroxide FLOCOOL 180 SODIUM dioxide SODIUM OXIDE (Na202) SOLOZONE... 

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