160 Dr. Gr. Grore on the Relation of Volfa Electromotive 



Experiment 6. 



Saturated solution of Nitrate of Strontium + Water. 



C. 



600 grains Sr2N0 3 in 63 c.c. of water i Temp, "before mixing 15*52 

 164"5 c.c. of water \ „ after „ 14*44 



Decrease 1 '08 C . deg. 

 E.M.F. with Cd + Ptat 18° C. 



Volt. Volt, 



Wats^^ S ° 1UtiOn = : 850°| Mean E.M.F. by weight= -9046 



The diluted solution = -9787 



p.cent. 



Increase -0741=8-19 



Experiment 7. 



Solution of 40 grains of Chloride of Sodium in 40 c.c. 

 of Water + 40 c.c. of Water. 



I did not ascertain the change of temperature produced by 

 dilution in this case. J. Thomsen and others had already 

 shown by experiment that the dilution of an aqueous solution 

 of chloride of sodium is attended by absorption of heat. 



E.M.F. with Zn + Pt at 22° C. 



^^.*^^^\™™ ° LR h ? ™ight=l-1889 



Volts. Volts. 



1-1270 [ Mean E - M - F - b y weight=l-1889 



The diluted solution =1-2557 



p.cent. 



Increase -0668=5-61 



Experiment 8. 



Strong solution of Sulphate of Sodium + Water. 



C. 



142 grains Na 2 S0 4 in 75*4 c.c. of water ) Temp, before mixing 15-22 

 40-6 c.c. of water | „ after „ 15-08 



Decrease *14 C. deg. 

 E.M.F. with Cd + Pt at 18° C. 



Volt. Volt. 



The strong solution = -993 I Mem E M R b wei ^ = . Q 



AY ater — 8o0 { •> c 



The diluted solution = '9872 



p.cent. 



Increase "0359==3*77 



