Salts ofMeconic and Komenic Acids. 197 



colour. The liquid was concentrated in vacuo over sulphuric 

 acid. The salt crystallized partly in a confused mass and 

 partly in short four-sided prisms. It had only a slight shade 

 of yellow, and its powder was very white. 

 When dried at 2 1 2° F. :— 



I. 0-9925 grm. lost 0*0945 = 9*04 per cent. 

 II. 1-275 ... lost 0-123 =9-035 ... 



I. 0-3832 grm. of salt burned with oxide of copper gave 

 0-5815 carbonic acid and 0-139 water. 



II. 0-3119 grm. of salt gave 0-4723 carbonic acid and 0-1 168 

 water. 



0-4015 grm. of salt dissolved in alcohol acidulated^^with muri- 

 atic acid gas gave 0-22 grm. of platinum = 9-75 per cent, am- 

 monia or 8 "04 per cent, nitrogen. 



I. II. At. Calculated numbers. Per cent. 



Carbon . 41-96 41-86 12 Carbon = 917-22 42-04 

 Hydrogen 4-03 4-25 7 Hydrogen = 87*357 4-01 

 Oxygen .45-97 45-85 10 Oxygen =1000-000 45-83 

 Nitrogen . 8-04 8-04 1 Nitrogen = 177-04 8'12 

 100-00 100-00 2181-617 lOO'OO 



The salt therefore is the acid komenate of ammonia with I 

 atom of water of crystallization. Its formula is KO + NHg 

 -f HO + 1 at. aq. 



Komenate of Lead. 



When neutral acetate of lead was added to a solution of 

 komenic acid it caused a whitish granular precipitate, which 

 immediately redissolved in the excess of acid present in the 

 liquid. This precipitate reappeared and remained perma- 

 nently on the addition of more acetate of lead. The precipi- 

 tate, which acquired a slightly yellow colour, was collected 

 on a filter and washed. When dried at 212° F. it was sub- 

 jected to analysis. 



I. 0-5316 grm. of salt gave 0-1389 of metallic lead and 

 0-1295 oxide = 58-50 per cent, oxide. 



II. 0-411 grm. gave 0-103 lead and 0-1295 oxide = 58*50 

 per cent, of oxide. 



I. 0*3683 salt when burned with chromate of lead gave 

 0-255 carbonic acid and 0*0385 water. 



