Synthetic Inorganic Chemistry

270 ELEMENTS OF GROUP IV repeating this process once or twice more, almost the entire mother liquor should be used up and nearly ...

STANNIC SULPHIDE 271 PREPARATION 43 STANNIC SULPHIDE (MOSAIC GOLD), SnS 2 Stannic sulphide, SnS 2 , is the higher sulphide of ti ...

272 ELEMENTS OF GROUP" IV Procedure: Stannous Sulphide. Place the stannous chloride in a beaker and treat it with its own weight ...

ANHYDROUS STANNIC CHLORIDE 273 62V HC1 — in warm Na2S. Does the mosaic gold dissolve in these reagents? Can you explain the diff ...

(^274) ELEMENTS OF GROUP IV This preparation is to be attempted only if 4 consecutive hours are available in the laboratory, and ...

ANHYDROUS STANNIC BROMIDE 275 quietly. Continue the action until all the tin has disappeared and the tin tetrachloride has been ...

276 ELEMENTS OF GROUP IV ments is a vigorous one, and usually it is necessary to cool the mixture to prevent the loss of bromine ...

ANHYDROUS STANNIC BROMIDE 277 been expelled and the liquid begins to distil slowly into the tube. The first part of the distilla ...

(^278) ELEMENTS OF GROUP IV PREPARATION 46 LEAD NITRATE, Pb(NO 3 ) 2 Lead nitrate is one of the most readily prepared salts of l ...

LEAD DIOXIDE 279 nitrate solution. Then add an excess of the reagent. Repeat, using sodium hydroxide instead of ammonium hydroxi ...

280 ELEMENTS OF GROUP IV residue of unoxidized lead, as Pb(OH) 2 , as well as calcium hydrox- ide and calcium carbonate from the ...

BED LEAD 281 temperature, stirring frequently, and finally boil it for 30 min- utes, replacing water lost by evaporation. Transf ...

282 ELEMENTS OF GROUP IV view is strengthened by the behavior of the substance when treated with nitric acid — part of the lead ...

CERIC OXIDE FROM CEROUS OXALATE 283 Procedure: It is rather difficult to adjust the temperature suc- cessfully for the dry metho ...

284 ELEMENTS OF GROUP IV If cerous oxalate is strongly heated in air, the water of crystal- lization is first driven off, then t ...

CEROUS OXALATE 285 product of the decomposition, of cerous oxalate, is readily oxidized by the oxygen of the air to eerie oxide, ...

286 ELEMENTS OF GROUP IV 50 cc. of boiling water, filter if necessary, and pour into the hot solution of cerous chloride while s ...

EXPERIMENTS 287 gently until the reaction starts. Stop heating until the reaction slows down, then heat cautiously to boiling, a ...

288 ELEMENTS OF GROUP IV nearly if not quite coincide with the light mark). Shake the tube vigorously for 60 seconds, then place ...

EXPERIMENTS 289 According to the equation, Na 2 CO 3 + H 2 CO 3 —• 2NaHCO 3 , 56 cc. of carbon dioxide should be dissolved in th ...