RICHARDS AND OENSLAGER. — CUPRIAMMONIUM SALTS. 85 



position given below. The crystals are soluble in water without de- 

 composition, and are fairly permanent in the air. 



Analyses of Cu2NH4(C2H302)5 • H^O. 



I. 0.2586 gram of the substance yielded an amount of ammonia re- 

 quiring 5.49 cubic centimeters of decinormal acid, and an elec- 

 trolysis gave 0.0717 gram of copper. 

 II. 0.4303 gram of the substance required 9.40 cubic centimeters of 

 decinormal acid. 



III. 0.2525 gram of the substance gave 0.0703 gram of copper. 



IV. 0.2604 gram of the substance required 5.52 cubic centimeters of 



acid, and gave .0725 gram of copper. 

 V. 0.3080 gram of the substance gave on combustion 0.2970 gram 

 of carbon dioxide. 



100.00 



Found, 



27.81 



3.88 



64.45 



3.86 



100.00 



(5 and 6.) Cupriammonium Acetate. 



This salt, discovered by Foerster,* may be prepared in an anhydrous 

 condition by allowing an alcoholic solution of cupric acetate containing 

 a slight excess of ammonia to evaporate in the air. Two determina- 



* Ber. der deutsch. chem. Gesellsch., 1892, XXV. 3416. 



