Disodium carbonate

Calculate the pH of a water sample made by mixing equal volumes of 10 mmol L"1 disodium carbonate (Na COj) and 10 mmol L I NaHC03 (baking soda). 

Carbonate (as Na2C03) Each milliliter of 1IV sulfuric acid required between the phenolphthalein and methyl orange endpoints in the Assay (above) is equivalent to 106.0 mg of disodium carbonate. 

CRYSTOL CARBONATE DISODIUM CARBONATE SODA ASH TRONA... 

Hydrogen chloride (35%, 0.2 mL) is added to a solution of 3.4b (32 mg) in 20 mL of acetone and the solution is stirred for 1 h at room temperature. After dilution with diethyl ether, washing with aqueous disodium carbonate (10%) and drying (MgS04), the solvent is evaporated and the residue is separated by preparative HPLC (RSiL, 10 mm, 25 x 1 cm, 5 mL/min) using hexane/ethyl acetate (7 3) as eluant t. The isolated reaction product 3.4c (32 mg, 89%) is cjco-2-(2-hydroxyethyl)bicyclo[3.2.1]oct-6-en-8-one together with the corresponding lactol (7 1). 

Carbonic xid disodium salt, monohydrate Disodium carbonate monohydrate Getrockneles natriumkcarbonat Natrii carbonas monohydricus Natrium carbonicum monohydrioum Soda ash Sodium carbonate monohydrate Sodium Carbonate. White solid bp = 851° d = 2.25 soluble in 3 parts H2O, insoluble in organic solvents. Church Dwight. 

Carbonic acid, disodium salt compd. with hydrogen peroxide (2 3) Disodium carbonate, compound with hydrogen peroxide (2 3) Disodium carbonate, hydrogen peroxide (2 3) EINECS 239-707-6 FB Sodium percarbonate Oxyper, Perdox Peroxy sodium carbonate Sodium carbonate peroxide Sodium percarbonate. Bleaching agent for domestic and industrial use, denture cleaner, mild antiseptic. Chemoxal Degussa AG Interox Am. 

Synonyms cas 497-19-8 carbonicacid disodiumsalt crystol carbonate disodium carbonate soda... 

Pi (CH30+ Casa ) allows reading the pH which is 2.63. In effervescent tablets ASA is usually mixed with ascorbic acid, sodium dihydrogencitrate and citric acid, as well as with sodium hydrogen carbonate and disodium carbonate. If a tablet containing only 400 mg ASA and 240 mg vitamin C is dissolved in 150 mL water (this corresponds to 0.0148 mol ASA and 0.009 mol vitamin C) one can describe the solution with the help of the pH-logc, diagram shown in Fig. 66. 

CAS-No [497-19-8] carbonic acid, disodium sail disodium carbonate soda soda ash... 

Hydrothermal experiments with p-SiC powders and watery solutions of 10% Na2C03, 10% NaHC03 and 50% NaHCOO yielded results which were very close to each other, because sodium hydrogen carbonate and sodium formiate can be converted to disodium carbonate at high temperatures according to... 

Synonyms Bisodium carbonate Calcined soda Carbonic acid disodium salt Crystol carbonate Disodium carbonate Natron Sal soda Soda ash Soda calcined Sodium carbonate (2 1)... 

A simpier version (11), avoiding lead salt formation, involves treatment of a hop extract in benzene with disodium carbonate solution (0.3 N). After acidification the aqueous layer is extracted with benzene and the solvent is removed. The residue is purified by complexation with 1,2-phenylenediamine. The subsequent procedure is identical to the one described above. 

Humulone (0.7 g 1.93 x 10 mol) is dissolved in iso-octane (20 ml) and disodium carbonate solution (0.3 N 20 ml). After boiling during 30 min, the solution is cooled, acidified with cold HCI 1 N and extracted with Iso-octane. The extract is dried and concentrated in vacuo. The yield of isohumulones is 85%. 

The hop beta acids are isolated by dissolving a hop extract in hexane ( 20%) and extracting this solution first with disodium carbonate 0.3 N and then with sodium hydroxide 1 N. The alpha acids are found in the disodium carbonate solution, while the less acidic beta acids are extracted only with the stronger base. After acidification, extraction with iso-octane and removal of the solvent, a crystalline residue is obtained, which contains the crude mixture of the beta acids (1). 

A hop extract (200 g) is dissolved in hexane (11) and the solution is extracted (2 x) with disodium carbonate (0.3 N 31). The organic layer is extracted (2 x) with sodium hydroxide (1 N, 3 I). The latter alkaline solution is acidified with HCI6 N to pH 2 and extracted again with hexane (250 ml). The organic extract may be eluted through a silica gel column before the solvent is removed. This procedure affords a nearly colourless solid residue of the beta acids. It is essential that all steps are carried out rapidly and that solutions are kept in the cold if waiting cannot be avoided. 

To a suspension of phlorisobutyrophenone (3.25 g 1.66 x 10 mol) in chloroform (30 ml) is added 3-methyl-2-butenyl bromide (4.93 g 3.6 x lOr mol). Work-up involves dilution with chloroform (40 ml) and consecutive washings with sodium hydrogen carbonate, disodium carbonate and NaOH 1 N. The chloroform extracts are... 

The corresponding acylated compound, which also occurs in the reaction mixture, may be obtained upon prolonged heating of lupulone (or colupulone) in disodium carbonate (9). The troublesome separation of compound 286 (Fig. 114) does not allow isolation of pure material. Periodate cleavage affords dehydrohumulinic acid (see 8.4.4.2.) and 2,8-dimethylnona-2,7-dien-5-one. Compound 286 is 2-(3-methyl-butanoyl)-5-(3-methyl-2-butenyl)-3,4-dihydroxy-4-[1-(3-methyl-2-butenyl)-1-hydroxy-4-methyl-3-pentenyl]-2-cyclopentenone. Isomerized hop extracts with a high level of beta acids contain compounds 285 and 286 (2-3%). 

Hydrogenation of trans isohumulone with Adams catalyst in aqueous disodium carbonate affords a resinous oil. Trans dihydro-isohumulone (1), (molecular formula C21H32O5) may be either compound 85 or compound 86, depending on the position of the remaining double bond (Fig. 47). The distinction between 85 and 86 was made via hydrolysis to humulinic acid, which proved that the double bond in the 4-methyi-3-pentenoyl side chain had been hydrogenated preferentially. Thus trans dihydro-isohumulone, obtained as described above, has been identified as 2-(3-methylbutanoyl)-5-(3-methyl-2-butenyl)-3,4-dihydroxy-4-(4-methylpentanoyl)-2-cyclopentenone (85). 

Miranol JBS Monacoi 1000 Monateric 811 Trade Names Containing Cola Cor 100 Disodium carbonate. See Sodium carbonate... 

---