456 
SIE B. C. BEODIE ON THE ACTION OF ELECTEICITY ON OASES. 
T— Tj the “ titre ” of the gas destroyed by the binoxide of sodium. 
P the amount of oxygen lost by the binoxide of sodium, ascertained by the titration 
with permanganate of potash in the way before mentioned. 
P 
m_m the ratio of the volume of oxygen evolved from the binoxide of sodium to the 
volume of oxygen evolved from the electrized gas. 
In these three experiments the solution of binoxide of sodium was saturated with 
carbonic acid. 
T. 
Ti- 
T— T r 
P. 
P 
'J-'-Tf 
7-98 
3-96 
4-02 
3-99 
0-98 
2-41 
0-08 
2-33 
2-57 
1-11 
1‘27 
0-05 
1-22 
1-28 
1-04 
There are doubtless numerous chemical substances which stand towards ozone in the 
same relation as iodide of potassium, and in which an oxidation may be effected by the 
electrized gas equal in amount to the “ titre ” of the gas without any alteration of its 
volume. Thus in two experiments in which the electrized gas was passed through a 
solution of the protonitrate of mercury, the two experiments being made consecutively 
and with the same solution, the following results were obtained : — 
Volume of gas in 
Volume of gas in 
tlie pipette. 
the aspirator. 
268-14 
267-21 
267-95 
268-05 
the gas being deprived of its special oxidizing power, and the oxidation effected without 
alteration of its volume. 
In the following experiments also, with protochloride of iron and protosulphate of iron, 
the oxidation effected is equal to the “ titre ” of the gas. In the case of protochloride 
of iron a measured quantity of the solution was “ titred ” before the experiment with 
permanganic acid, and the volume of oxygen required to effect its complete oxidation 
was determined. The solution through which the gas was passed was similarly “ titred.” 
From the difference between the “ titre ” of these solutions the oxidation effected by the 
electrized gas was estimated. 
In the case of the protosulphate of iron, the ozone was not entirely destroyed by its 
passage through the solution, and a second bulb containing a solution of iodide of 
potassium was placed after the bulb containing the solution of protosulphate of iron ; 
the difference of the original “ titre ” of the gas and the “ titre ” of the gas after its 
passage through the solution of protosulphate of iron gives the amount of oxidizing 
power lost by the electrized gas in its passage through that solution. The difference 
between the “ titre ” of the solution of the protosulphate of iron before and after the 
experiment gives the oxidation actually effected. The following is the result of one 
