Sodium carbonate NaCO

The Leblanc process for converting table salt (NaCl) to sodium carbonate (NaCO,) for soap... 

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. 

Sodium reacts with carbon monoxide at 250 to 340°C forming sodium carbonyl, (NaCO)e. At higher temperatures, sodium carbide Na2C2 is formed. With acetylene the products are sodium acetyhde, NaC CH and disodium... 

The concentration of dissolved CO2 includes the small amount of undissociated (dissolved) carbonic acid. It can be expressed as cdC02 = a x PCO2, where a is the solubility coefficient for CO2. CHCO3 then represents ctC02 minus cdC02, which includes carbonic acid. The bicarbonate concentration by this definition includes undissociated sodium bicarbonate, carbonate (NaCOs) and carbamate (carbamino-C02 RCNHCOO ), which are present in exceedingly small amounts in plasma. 

Sodium Carbonate. United Nations Environmental Programme. http //www.inchem.org/documents/sids/sids/Naco.pdf (accessed on November 8, 2005). 

Sodium Carbonate. This solution consists of 1% NaCOs with 0.5% NaN02. The polarization curves also show that this system achieves spontaneous passivation oniy when air is present. 

NaCO lOHjO Sodium carbonate decahydrate 5.3 r.t. 6x10 ... 

Figure 12a) also the Na2C08 specimens are not blue after irradiation. Further, carbonate free NaOH prepared from distilled sodium metal gave the same results as AnalaR NaOH which contains about 2.5% NaCO as an impurity. Finally, the new resonance signals found in the alkali hydroxide systems are not caused by a direct effect of radiation on the solute, since solid NaOH itself on 7-irradiation at 770 K. neither turns blue, nor shows the characteristic ESR spectra discussed above (16,45). 

Both sodium and potassium form carbonyl compounds, NaCO and KCO, respectively. Both compounds are highly reactive solids prone to explode when exposed to water or air. Decomposition of the carbonyls gives off caustic oxides and hydroxides of Na and K, as well as toxic carbon monoxide. 

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