Synthetic Inorganic Chemistry

310 ELEMENTS OF GROUP V QUESTIONS Treat a fragment of antimony trichloride with water. Why does it not give a clear solution? A ...

SODIUM SULPHANTIMONATE 311 Sodium sulphantimonate can be prepared from stibnite by the combined action of a solution of sodium s ...

312 ELEMENTS OF GROUP V What secondary reaction accounts for the formation of the precipi- tate if its formula is Sb 2 S 5? Act ...

METALLIC ANTIMONY 313 from the paper and pulverize them in a mortar. Put up the prod- uct in a cork-stoppered bottle. QUESTIONS ...

314 ELEMENTS OF GROUP V regulus of antimony. Crack the regulus so as to show the crystal- line structure of the metal. QUESTIONS ...

EXPERIMENTS 315 Materials: crystallized bismuth nitrate, Bi(NO 3 )3, 5H 2 O, 42 grams = 0.1 F.W. QN HNO 3 , 10 cc Na 2 CO 3 solu ...

316 ELEMENTS OF GROUP V excess of 6N HNO 3 (10-15 cc.) and note that red gases are evolved in each case. (a) A clear solution re ...

EXPERIMENTS 317 Review the discussion of thio- or sulpho-salts under Prepa- ration 57. The trisulphides As 2 S 3 and Sb 2 S 3 ar ...

318 ELEMENTS OF GROUP V ing and cooling until the precipitate formed at first is redis- solved. Pour this solution over the filt ...

GENERAL QUESTIONS X 319 Name the simplest hydrogen compounds of nitrogen, phos- phorus, arsenic, and antimony. Compare the stab ...

CHAPTER XI HEAVY METALS OF GROUPS VI, VII, AND VIII OF THE PERIODIC SYSTEM An inspection of the Periodic Table of the elements s ...

POTASSIUM CHROMATE AND DICHROMATE 321 In Group VIII, each position instead of being filled by a single element is occupied by a ...

322 HEAVY METALS OP GKOUPS VI, VII, AND VIII On account of the difficulty of carrying out the industrial process on a laboratory ...

POTASSIUM CHROMATE AND DICHROMATE 323 minutes' heating the mixture becomes quite thick and is likely to froth over. To prevent t ...

324 HEAVY METALS OF GROUPS VI, VII, AND VIII QUESTIONS Name at least three oxidizing agents which might have been used instead ...

CHROMIC ANHYDRIDE 325 constant stirring about half of the concentrated sulphuric acid until a slight permanent precipitate of Cr ...

326 HEAVY METALS OF GROUPS VI, VII, AND VIII Without the recrystallization the weight of the product of this preparation is oft ...

AMMONIUM CHROMATE AND AMMONIUM DICHROMATE 327 Procedure: Place the chromic anhydride in a 500-cc. flask and add 70 cc. of water. ...

328 HEAVY METALS OF GROUPS VI, VII, AND VIII on the filter. Wash the crystals with 10 cc. of ice water and drain again. Dry the ...

CHROMIC ALUM 329 chromium. Alcohol may be used as the reducing agent, it being itself oxidized to acetaldehyde, C2H4O, a substan ...