On the Oxidation of Ferrous Salts 249 



TABLE VI. 



The effect of dilution on the rate of action will be apparent 

 from Table VII. For each experiment 10 c.c. of ferrous sul- 

 phate (a) were allowed to react on 10 c.c. chlorate of potassium 

 along with 10 c.c. H 2 SO 4 , and different quantities of water, 

 which will be apparent from the figures giving the total volume 

 of the solution. After standing exactly half an hour they were 

 titrated with permanganate. In the last four experiments in 

 this table the sulphuric acid used was formed by diluting 

 I part of oil of vitriol with 4 parts of water (both by weight) ; 

 it may therefore be written 2H 2 SO 4 , as there are two gram- 

 molecules in the litre. Three blank experiments gave 17-6 as 

 the permanganate equivalent to the 10 c.c. ferrous sulphate. 



TABLE VII. 



It i> shown by these experiments that the energy of the 

 oxidising action of the oxides of Chlorine and of Nitrogen is in 

 inverse proportion to the amount of oxygen which they c.mt.tm 

 and that the n-i-t .mce to reduction is ^n-atost in the case of tin- 

 saturated bodies. H,<>. n.<> 7 and H,o. N. 2 O 5 - 



