Alkali sodium carbonate

Removal of acids from water-immiscible solvents by washing with aqueous alkali, sodium carbonate or sodium bicarbonate. 

Sodium in Plants and Animals. By macerating certain plants in warm water acidified with different mineral acids, G.-F. Rouelle (1703-1770) prepared and identified the neutral sodium salts of the corresponding acids and thus demonstrated the presence of the mineral alkali (sodium carbonate) in these plants. He believed that the sodium carbonate was not merely absorbed from the soil but that it was a true product of vegetation (11). 

If iron is present, the dry residue is subjected for several weeks to sunlight which renders the iron insoluble in acetic acid, after which acetic acid dissolves the calcium and magnesium carbonates which are separated by dilute sulphuric acid, precipitating calcium and dissolving magnesia. The residue from acetic acid treatment consists of clay, silicious matter and iron. The clay and iron are dissolved by marine acid (hydrochloric) and the iron precipitated by caustic alkali (phlogisticated alkali) and the clay by alkali carbonate. The silicious matter may be identified by its complete solution with effervescence under the blowpipe with mineral alkali (sodium carbonate). 

Quinoline-8-arsinic add, obtained from 8-amino-quinoline in 83 per cent, yield, crystallises in white needles, M.pt. 230° C-, readily soluble in dilute alkali, sodium carbonate, and concentrated mineral acids, insoluble in dilute acids, alcohol, and cold water. When reduced... 

Soap [per cent) Alkali (sodium carbonate) (per cent)... 

This is achieved by clearing the wine and adding a milk producer. The wine is cleared by phcnoli>htbalein phis an alkali (sodium carbonate) in excess to turn to milk, add calcium chloride plus acid (tartaric). 

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