112 Journal of the Asiatic Society of Bengal. (April, 1911. 
Experiment with Barium Nitrite Solution. 
T. 01 cc. of the stock Barium Nitrite solution gave 
nitrogen = 3:2 c.c. at 30° C by. the ‘‘ Urea ’’ method. 
Therefore ‘eal ** nitritic’’ nitrogen = 16 C.c. 
0:5 c.c. of the above solution diluted to 8 c.c. in the ‘‘ Crum” 
gave with solid excess of hydrazine sulphate 11°5 c.c. total gas, 
and 5°3 c.c. nitro : 
The solubility of nitrous oxide in 8 c.c. of water at 30° C 
(temperature of the experiment) is given by the following 
formula: C=1-305—-0453 t+-00068 t?=1:305 — -0453 x 30 + 
00068 x 900 =°55 nearly. 
ence for 8 c.c. dilution, solubility=8 x 55=4-4 c.c. 
Adding this to the 11°5 c.c. gas actually obtained, we have 
total volume of mixed gas equal to 15°9 c.c.; that required 
according to the equations stated above is equal to 16:0 c.c. 
The amount of “ nitritic”’ nitrogen in 0°5 c.c. of the Barium 
nitrite solution, as found above, is equal to 8c.c. The nitrogen 
obtained in the present experiment by the action of hydrazine 
sulphate upon the 0:5 c.c. Barium nitrite solution is equal to 
53c.c. The te of the latter nitrogen to the former is there- 
fore equal to > == %, which is the ratio expected. 
A better confirmation of the above equations cannot be 
expected, and the ares estimation of ammonia has hence 
been thought useless 
II. 0-5 c.c. of the same solution diluted to 5 c.c. gave 
total volume of gas equal to 13'1 c.c. and nitrogen =5'3 ¢.c. 
Allowing for solubility by the above formula, S =5 x *55 = 2°75 c.c. 
Therefore total volume is ve ig to 13°1 + 2°75 = 15°85 c.c. 
Theoretical volume = 16:0 ¢ 
Ill. 0°5c.c. diluted to 2 c.c. gave total volume of gas 
equal to 147 c.c. and N=5-3e¢ 
S=2x °65=1°'1 c.c. 
Therefore total volume is equal to 14:7 + 1:1 =15°8 c.c. 
Theoretical volume equal to 16 c.c. 
Experiment with solution of Potassium Nitrite. 
I. 05 c.c. of the stock KNO, solution gave by the 
**Urea’’ method N= 4-2 c.c. 
raga Hen ‘*nitritic ’ * nitrogen = 21e 
f the above stock solution, with solid excess of 
higetrsatins dilphute: diluted to 6-4 c.c. — the Nitrometer, gave 
total gas equal to 13-1 c.c. and N=5°65 c.c. 
a Se owing for solubility by the bose formula, S =6°4 x °55 
‘Thekelins total volume = 13°1 + 3°52 = 16°62 c.c. 
Theoretical volume = 16°8 c.c. 
