Found inside – Page 54They are not changed when the water is boiled . Permanently hard water may be softened by the addition of sodium carbonate or by the use of a complex sodium aluminum silicate , NaAlSiO4 , which is known commercially as " Permutit . Found inside – Page 122Lime and sodium produce corrosion are not allowed to arise . carbonate are added to boiler water containing calcium In the selection of boiler material great care should be and magnesium salts , and the precipitated calcium cartaken that ... Found inside – Page 154Very low percentage of sodium carbonate also makes the water unsuitable for irrigation . In small irrigation projects , the quality of water can be improved by passing water through blocks of gypsum , where by the proportion of sodium to other ... Found inside – Page 4Dehalogenation of tetrachloroneopentane , a ) In aqueous alcohol , Into a flask were introduced 21 g tetrachloroneopentane , 50 ml alcohol , 17.5 ml water , 25 g zinc dust , 10.6 sodium carbonate and 2.5 g sodium iodide . The mixture was ... Found inside – Page 1208The role of the volatile decomposition products as the Apparently , the sodium carbonate neutralises the acid main factor in ... In the similar . presence of water , the acceleration of the decomposition of The addition of small amounts of sodium ... Found inside – Page 106Cuprous chloride reacts with water to form cuprous oxide and hydrochloric acid . In the presence of sodium sesquicarbonate the hydrochloric acid is removed as it forms by the carbonate , eventually converting all of the cuprous chloride to ... Found inside – Page 4On the formation by the fermentation of sugars and mashes by different yeasts in the presence of sodium carbonate and sodium ... 576 ) Chemical Methods of Formation : Glycerine is formed in small quantities by treatment on a water bath of ... Found inside – Page 32The boiler waters showed the presence of a high alkalinity with a correspondingly small sulphate content. ... When the water is heated in the boiler the sodium bicarbonate breaks down to give the carbonate, which in turn decomposes to give ... Found inside – Page 202cases , the manufacturer of steam generating units provides the information on the correct water level to be maintained in ... The increased concenration of the sodium hydroxide in the crevices or seams of the joints , especially in the presence ... Found inside – Page 10Alkalinity An alkaline water is caused by sodium carbonate or bicarbonate , and the bicarbonates of calcium and magnesium . The presence of too much sodium ( or potassium ) in water causes foaming in boilers and frequently presents a ... Found inside – Page 541All three oxides form sodium hydroxide with water , but only the oxide Nago is directly transformed into a hydrate . The other oxides liberate either hydrogen or oxygen ; they also present a similar distinction yith reference to many other agents . Found inside – Page 188There is soluble in water a trace of magnesium sulphate, and a minute trace of chlorides—probably sodium chloride. The clay was also tested for the presence of metals, and no arsenic or other poisonous metal was detected. No. 2,400/19. Found inside – Page 9In one well the fluoride occurs in a hard calcium - sulfate water ; in the other , in a soft sodium - bicarbonate water . The presence of fluoride in water from wells penetrating granitic rock suggests that the high fluoride content of the soft sodium ... Found inside – Page 336 gran - atom of chlorine reacted under the same conditions in a sodium hydroxide or sodium carbonate solution . This suggested that decontamination of the free amine in water should be carried out in the presence of alkali , since hydrogen ... Found inside – Page 36X / 3229 The water contained 29.5 parts per 100,000 of suspended solids — mainly mud . The presence of relatively ... X / 3241 ( 1 , 2 ) Temporary hardness , 17 ; sodium carbonate , 5. These waters_are ... use in locomotives . The presence of ... Found inside – Page 10This is also the reason for the increased water - retaining power , smelling , weak penetration of water , slow rise of water , etc. ... The presence of sodium carbonate itself in the soil is a result of the presence of absorbed sodium . Both of these ... CHAPTER I IMPURITIES IN FEED WATER FOR BOILERS Pure water is a chemical compound made up of two parts hydrogen . and one Part oxygcn, by volurne, and welghs 62.4 pounds per cubic foot at a temperature of 62 degrees F. It is never found in a ... Found inside – Page 39both sodium and sulfate indicate the presence of sodium sulfate . ( 2 ) A high test for sodium in a strongly alkaline soil or water , pH 8 . 3 and up , indicates the presence of sodium carbonate . ( 3 ) High tests for sodium and chloride in any soil or ... Found inside – Page 29Bicarbonate ( HCO3 ) . The presence of bicarbonate in water is due Brincipally to the action of carbon dioxide on compounds of calcium , nagnesium , and other bases . Some sodium bicarbonate water may conain more than 1,000 parts per ... Found inside – Page 90Much will depend upon the purpose for which the water is to be used, and the presence of carbonic acid may be ... As previously pointed out, the presence of residual sodium carbonate in water may have varying effects according to the ... Found inside – Page 904In view of the capacity of the normal kidney to excrete sodium bicarbonate in the presence of plenty of water ( 2.8 per cent ) and the limited degree of calcium absorption by the intestine ( maximum 3 Gm . per day ) , something other than the ... Found inside – Page 147singly or as mixtures : Caustic soda , sodium carbonate ( soda ash ) , sodium bicarbonate , trisodium phosphate , sodium ... to use hard water for washing purposes , the presence of some trisodium phosphate and / or sodium metasilicate in the ... Found insideSodium carbonate solution is hydrolysed and dissociated to 2NaOH and H2CO3 . Now CaCO , in the presence of NaOH becomes Ca ( OH ) , plus Na , COs , the lime would therefore remain in part as hydroxide , and all the soda would be ... Found inside – Page 94Apply the biuret test to the cool solution . A positive reaction indicates the presence of proteoses . Biuret Reaction . Treat about 3 c.c. of the solution with 1 c.c. of 40 per cent sodium hydroxide . Add a single drop of 1 per cent solution of copper ... Found inside – Page 21ever , the upward movement from a free water - table is too slow to be of much practical use over distances greater ... A highly alkaline reaction , such as may be caused by the presence of sodium carbonate or " black alkali " , is undesirable . Found inside – Page 164definite records of the presence of sodium carbonate , otherwise than as a trace . ... of samples of water were examined qualitatively on the spot for sodium carbonate ( alkalinity to phenolphthalein ) and sodium bicarbonate ( alkalinity to methyl ... Found inside – Page 205W90-08196 TION OF SULPHITE IN WATER BY IONCHROMATOGRAPHY . ... In the presence of iron ( III ) , the sodium bicarbonate / formaldehyde eluent was used and ... Found inside – Page 138The presence of free carbon dioxide in water is cau be presence caused by the decay of organic matter , solution of carbon dioxide from underground sources and solution ... Sodium hydroxide ( caustic soda ) is a by - product of this reaction . Found inside – Page 373... 10 min . droxy - 4 - methoxyphenyl 3,4 - dimethoxybenzyl ketone The cooled solution was poure : into water and with diethyl carbonate in presence of sodium extracted with ether . The ether extract wa ; dried methoxide ) was unsuccessful . Found inside – Page 63If base - exchange materials are also present to replace calcium with sodium , a still greater amount of bicarbonate can be held in solution . The presence of carbonaceous material , together with calcium carbonate and base exchange ... Found inside – Page 1044was refluxed with sodium carbonate solution (30 ml; 7%) for 1 hr. ... The product which separated was filtered and washed with sodium bicarbonate solution followed by water. ... in acetone in the presence of sodium bicarbonate (2 g.) for 6 hr. Found inside – Page 215When sodium bicarbonate is combined with water , an interesting change occurs . The presence of hydrogen ( H ) in its formula , NaHCO3 , indicates that it is an acid salt . Yet we use soda in cookery to offset acid and sometimes use it as a ... Found inside – Page 215... that the sodium salt of hexahydrolupulone was less containing substance of the type then known as “ pseudo soluble in water than ... on the basis of evidence then available , that the salt contained were the first to demonstrate the existence of at least three one ... could be subsequent regeneration of the resin to give a crystalline precipitated from saturated sodium bicarbonate solutions as product , mp . Found inside – Page 305When 100 mg of gramIts sodium salt was freely soluble in water ( 5 % solutions were prepared ) , even in the icidin , dissolved in 2.5 ml of 95 % ethanol presence of sodium chloride . However , hy- containing 200 mg of sodium carbonate , was ... Found inside – Page 161as sodium carbonate itself in dilute aqueous solutions is almost completely hydrolyzed to sodium hydroxide ... unless the soluble product of the reaction ( sodium hydroxide ) is removed in the drainage water , the presence of this alkali will ... Found inside – Page 14The sodium ionic concentration factors of the water from the spring and well are 68 & 64 percent , respectively , and the bicarbonate ionic concentration factors are 81 and 82 percent , respectively . Both samples have ionic concentration ... Found inside – Page 773Sodium silicate dissolved in aerated distilled water reduces the action of ... Distilled water containing carbonate of calcium and in the presence of air ... Found inside – Page 195But a solution of sodium carbonate , even when dilute , has a strong alkaline reaction , turning red litmus blue as though ... The presence of a small proportion of sodium hydroxide in the liquid accounts for the alkaline reaction , the soapy feel ... Found inside – Page 4204The product was washed with 2N-sodium hydroxide and water, yielding a fawn powder (1.1 g.), m. p. 204°. Sublimation (150°/0.3 mm.) and two crystallisations from benzene gave pale yellow needles, m. p. 203–205°. 5-Bromoisoquinoline. Found inside – Page 451Embrittlement is attributed to the presence of a certain concentration of sodium hydroxide * in the absence of inhibiting ... water was high in sodium bicarbonate which broke down into sodium carbonate in the boiler and partially hydrolized . Found inside – Page 32The presence of sodium carbonato has a softening orfect on tiid water ; thus sample No . 2 in the table of analysos is fron the deepest well , the water contains the greatest amount of sodium carbonate , and it is the softest of the waters . Water ... Found inside – Page 9In one well the fluoride occurs in a hard calcium - sulfate water ; in the other , in a soft sodium - bicarbonate water . The presence of fluoride in water from wells penetrating granitic rock suggests that the high fluoride content of the soft sodium ... Found inside – Page 289B en 3 ning the adhesion of binders to different stones in the presence of water . ... a small size , mixed with a definite proportion of binder , and boiled for a definite time either in water or in sodium carbonate solutions of various concentrations . Found inside – Page 262The following extracts from the Report having special reference to water supply are reprinted in this issue of the ... 4 mg / l ( as Manoxol OT ) and a very high carbonate alkalinity , 525 mg / l as CaCO3 , due to the presence of sodium carbonate . Found inside – Page 155RESIDUAL SODIUM CARBONATE Closely related to the sodium problem is the difficulty brought about by disproportionately high concentrations of bicarbonate in an irrigation water . To predict the presence of a bicarbonate problem in an ... Found inside – Page 178Fuse the residue with sodium carbonate , extract the melt with water , filter , and wash with dilute sodium carbonate solution . Dissolve the residue in dilute sulfuric acid and repeat the precipitation with cupferron . Ignite and weigh as Ti02 and ... Should be carried out in the presence of hydrogen ( H ) in its formula, NaHCO3 indicates! Gave pale yellow needles, m. p. 203–205° to arise distinction yith reference to many other.. 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