Found inside – Page 84Aqua regia is another oxidizing acid prepared by mixing one part of nitric acid with three parts of hydrochloric acid . Since the acid ... Dilute the acid with water , and then neutralize it with sodium carbonate or limestone . Any cloths or mops ... Found inside – Page 13Add from a burette sodium bicarbonate solution ( 8 per cent ) until a permanent precipitate is formed ( approximately 36 ml . ) ... the precipitate to a beaker , dissolving it in aqua regia , fuming , with sulfuric acid , and then carefully adding sodium peroxide in excess and boiling . ... When the sample is dissolved , dilute to 200 ml . , nearly neutralize with NH4OH and then add 5 - ml . portions of a freshly ... Found inside – Page 113Note - The solid residue from aqua regia consists mainly of silica , stannic oxide , small amounts of iron oxide , various ... Partly neutralize the filtrate by adding sodium bicarbonate cautiously until effervescence becomes less brisk , but the ... Found inside – Page 172Partly neutralize minutes longer if wolfram is present . Dilute with hot water . the filtrate by adding sodium bicarbonate cautiously until efferFilter hot and wash well with hot water , especially ... The solid residue from aqua regia consists mainly of The sodium salts now present should be completely washed out . silica , stannic ... Found inside – Page 283Since then many chemists have doubted the ex- chloride by sodium chloride or chlorhydric acid , and reistence of salylic acid , though the ... Kolbe has sited on the copper as in ( 3 ) above . now cleared this doubt by distilling salylic acid with ( 6 ) Add sodic bicarbonate or sodic hydrate . ... RECOVERY OF PHOTOGRAPHIC WASTE Filter again , make up to 35 grms . to oz . , neutralize , PRODUCTS . expose to sun a ... Oxidize sulphur by aqua regia , and reduce silver chloride as in UI . Found inside – Page 434Test another portion in the spectroscope for INDIUM , and another by fusing with sodium carbonate and potassium chlorate for CHROMIUM . To the filtrate from the barium carbonate precipitate first add sulphuric acid to remove barium , filter , concentrate strongly by evaporation , neutralize exactly with potassa ... ED. ] nitric acid , and aqua regia , is much enlarged 434 SPECIAL NOTES TO $$ 188 to 196 . Found inside – Page 479Add 2 grams of sodium bicarbonate , then titrate immediately with 0.01 N arsenious oxide solution . 8. When the ... When the oxide has all dissolved , the solution is neutralized with dilute sulfuric acid , using phenolpthalein . Then 40 ... dissolve in aqua regia , evaporate to dryness twice with hydrochloric acid , dilute with water , and let stand several hours for the precipitate to agglomerate and settle . Found inside – Page 83Aqua regia should be freshly prepared and never be stored . ... water and then neutralize by sodium bicarbonate ( caution : add sodium bicarbonate slowly to ... Found inside – Page 204... aqua regia , and add to the solution sufficient uranium oxide to give it a fine brown color . ... Neutralize the remainder with barium carbonate in slight excess and set aside until carbonic acid is no longer given off . ... 5 parts . Sodium chloride . Found inside – Page 186... in a bath of aqua regia (a mixture of hydrochloric and nitric acids). ... to be most effective for this purpose was sodium bicarbonate ('baking soda'), ... Found inside – Page 57of gold was prepared by dissolving the metal in a bath of aqua regia ( a mixture of hydrochloric and nitric acids ) . ... We had to neutralize it before any gold in the solution could plate out onto the copper . The salt we found most effective for this purpose was sodium bicarbonate ( " baking soda " ) , and the optimum pH ( the standard measure of acidity or alkalinity ) for plating proved to be 9 , or somewhat ... Found inside – Page 350Now neutralize the solution by the addition of sodium carbonate , or by passing sulphur dioxide as may be required . ... Dissolve in aqua regia 1 grain fine gold , previously rolled very thin , in a porcelain capsule heated on the sand bath and ... Found inside – Page 289... and then aqua regia took its place . Sodium bicarbonate was used to neutralize the excess . This , too , did not accomplish the desired effect . Sodium superoxide took the place of sodium bicarbonate . It was thought that the strong foaming ... Found inside – Page 929The solid residue from aqua regia consists mainly of siliva , stannic oxide , small amounts of iron oxide , various insoluble ... Partly neutralize the filtrate by adding sodium bicarbonate cautiously until effervescence becomes less brisk , but the ... Found inside – Page 204Oxides of nitrogen given off when samples are dissolving in nitric acid or aqua regia are ... If necessary sodium bicarbonate solution may be used to neutralize , but thoroughly drenching the affected parts with water is to be preferred . Found inside – Page 141... sodium bicarbonate : 8.0 g ; iodine solution ( 0.1 N ) . ... in acetarsol is destroyed primarily by boiling it with aqua - regia ( a mixture of conc . Found inside – Page 83Aqua Regia means 'Royal Water' in Latin. It is used to dissolve noble metals like gold and platinum. Sodium carbonate is used in the manufacture of ... Found inside – Page 241In neutralizing , it is better to neutralize with sodium hydroxide and finish with sodium bicarbonate , as this lessens the chance of loss by ... _ Treat i gm . of finely pulverized ore with 15 cc . of aqua regia , and evaporate nearly to dryness . Found inside – Page 83Aqua Regia means 'Royal Water' in Latin. It is used to dissolve noble metals like gold and platinum. Sodium carbonate is used in the manufacture of ... Found inside – Page 886Fuse with potassium The following is a tabular view of my best observations nitrate and sodium carbonate . ... Filter 12 ) P.M. to 23 ,, rest and cuca 24 again , make up to 35 grms . to oz . , neutralize , expose to 30-8 28.6 * 6 and cuca 44 to 11 33.5 sun a week , and bath is ready for use . rest to 4 A.M. 307 360 ... Oxidize sulphur by aqua silver . B. Separated from regia , and reduce silver chloride as in III . 5. Found inside – Page 283Since then many chemists have doubted the ex- chloride by sodium chloride or chlorhydric acid , and reistence of salylic acid , though the ... Kolbe has sited on the copper as in ( 3 ) above . now cleared this doubt by distilling salylic acid with ( 6 ) Add sodic bicarbonate or sodic hydrate . ... RECOVERY OF PHOTOGRAPHIC WASTE Filter again , make up to 35 grms . to oz . , neutralize , PRODUCTS . expose to sun a ... Oxidize sulphur by aqua regia , and reduce silver chloride as in III . Found inside – Page 96... be remembered here that a weak solution of an alkaline salt , such as sodium bicarbonate , will at once neutralize the ... The official preparations are : Acidum Nitrohydrochloricum , U.S.P. ( Aqua Regia ; Nitric Acid 18 vols .; Hydrochloric Acid ... 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