Accori^T OP ciRiuM. Qgg 



With Carbonic Acid. 



(G.) The carbonate of ammonia precipitates muriate of Carbonate of ce» 

 cerium without effervefcence. After the precipitation, car-""™' 

 bonic acid is flowly difengaged in the form of bubbles. The 

 refidue retains its acid, even after deiiccation. 



Dry carbonate of cerium has a white colour tending a littlo 

 (o bluifh or greenifli. It diflblves in the acids with efFer-' 

 vefcence. It does not lofe its acid in an open fire. In clofed 

 veflels, without the conta6l of oxigen, it fupports a gentle 

 calcination, without being decompofed. 



With Arfenic Acid. 



{H.) Free arfenic acid does not produce any change on Arfeniate aa^ 

 muriate of cerium. The oxide digefted with this acid, forms ^'^'^"J!°"^^'^^'^*'• 

 an infoluble fait. An excefs of this acid dlffolves it, and gives 

 an acidulous arfeniate of cerium. The faturated arfeniate of 

 cerium is depofited in the form of a powder during the evapo- 

 ration. The refidue does not cryftallize, but by deficcation, 

 becomes a gelatinous, clear, and colourlefs mafs. 



With MoUhdic Acid, 



(L) The acidulous falts of cerium are not decompofed by Molybdate ©f cc- 

 molybdate of ammoniac. The molybdate of cerium is precipi* ^*^™' 

 tated from its faturated folutions, in the form of a white fait, 

 which is not foluble in the acids. 



With Oxalic Acid, 



(K.) Either the acidulous or faturated folutions of cerium Oxalate of ccri- 

 are precipitated by oxalic acid. According to the degree "™* 

 of oxidation of the metal, the precipitate becomes red or 

 white: This combination is alfo obtained by digefting the 

 oxide with free oxalic acid. An excefs of acid does not dif- 

 folve it, but ammonia readily effedts its folution, giving it a 

 yellow colour. 



A fmall quantity of oxide is depofited by evaporation. 

 The folution afterwards yields regular cryftals in the form of 

 peedles, Fare alkalies do not occafion any precipitate. 



Wiih 



