OF AQUEOUS SOLUTIONS. BARNES. 



135 



Determination of p. 



When equal volumes of simple solutions are mixed the ratio 

 expressed by p is equal to the ratio of the specific gravity of the 

 mixture to the mean specific gravity of the constituent solutions. 

 Table II shows that the ratio is practically equal to unity for 

 the most concentrated solutions examined. 



TABLE II. 



Results of the Observations and Calculations of the Conductivity 



of Mixtures. 



Table III contains the results of the observations and the 

 calculations, by means of the data given therein, of the con- 

 ductivity of mixtures of the acids under consideration. The 

 regional concentration k l of the hydrochloric acid may be 

 obtained from the value k z by means of the expression 



^i 7 

 fcj =^~k z , 



where & 2 is the regional concentration of the sulphuric acid. 

 The specific molecular conductivities at infinite dilution have 

 the values given above. In this table the conductivities and 

 concentrations are expressed as in Table I. The differences 

 between the calculated and observed values of the conductivity 

 are given as percentages of observed values. 



