181-2 



Atomic Volume and Specific Gravity. 507 



r.^ Section VII. ir 



ir 



Owalates. 



^^ ^j^ pxalates pnered ap interesting' groii p ' of salts for exa- 

 mination, especially on account of the accurate determination 

 c)f their composition and hydration by Graham. 

 ^' (^xalate of Water, HOjCgOg + 2H0 = 63-26.— 32 grains 

 of oxalic acid, dissolved in 1000 grains of water, caused an in- 

 crease of 18*5 at a temperature of 55°; the same quantity, 

 being subjected to a second experiment, caused an increase of 

 19; and a third experiment, in which 21 grains were dis- 

 solved in 9^ ounces -of ^ater, occasioned an increase of 12 at 



40°. 



h'i 





"^1110,02 0^ + 2TJO, vol. in solution 





■3-1 ^u^ -.i 



Mean! 



36-5 

 37-5 

 36-Q 

 36-6 



I A whole equivalent thrown into turpentine caused, in va- 

 rious experiments, an increase of 39"0, which gives for it^ 

 specific gravity 1"622. Richter states the specific gravity to 

 be 1*507 5 but it is impossible that he can have operated upon 

 a pure specimen, as we have repeated the experiments upoii 

 this acid very frequently. .., 



Oxalate of Potash, KO, Cg O3 + HO = 92-39:— A ^likn- 

 tity of salt, 42*5 grains, being dissolved in 1000 grains of 

 w-ater, gave an increase of 13*0 ; and the same result attended 

 a repetition of the experiment, the temperature in both cases 

 being at 60°. , . , 



() KO, CgOg 4- HOi vol. in solution 28*2 --i ^.i^;^; 



i 46*2 grains of the same salt, being put into a saturated so- 

 lution, caused a rise in the stem of 22*0; a repetition of the 

 experiment with the same quantity gave the increase 2V9, 

 the temperature in both cases being 61°. i u .hI «t 



' ' f ^''^l; KO, C2 O3 + HO, vol. of salt 44-0^'iqUJ i' 2-100 '• > 

 "II. ... ... ... 43-8- ... ^09 



Mean . 



43-9 



2-104 



Oxalate of Ammonia, Nil 4O, C^ Og -t..H.6,rW> 7^43*— Half 

 an equivalent of this salt (35'7l grains) was dissolved in 1000 

 grains of water with an increase of 18*0 at a temperature of 

 55°; and a repetition of the experiment with the same quan- 

 tities and at the same temperature, gave exactly the same re-, 

 suit. 



2 L 2 



