4(3 Dr. G. Gore on a Method of Measuring 



Section H. — Halogens + Acids. 



Table XXIII. — Positive metal, Zinc. 



Strength of Solution same as in Table XXII. 



Ingredients. 



E.M.F. 



Mixture. 



E.M.F. 



Calculated 

 E.M.F. 



Change of 

 E.M.F. 



Per 

 cent. 



01. 



HCl. 

 H 2 S0 4 . 



1-9250 

 1-3558 

 1-33578 



01 + HCl. 

 C1+H 2 S0 4 . 



1-76478 

 1-77622 



1-6364 

 1-5833 



Gain -12838 

 „ -19292 



= 7-84 

 12-18 



Br. 



1-8706 



Br + HCl. 

 2Br+H 2 S0 4 . 



1-79338 

 1-78480 



1-7093 

 1-6674 



Gain -084 

 „ -1174 



= 4-91 

 7042 



Formic acid. 



1-27858 



CH- Formic acid. 



L-80482 



1-5601 



Gain -24472 



= 15-68 



I. 



Citric acid. 



1-4416 

 1-24998 



31 -f- Citric acid. 



1-3987 



1-3773 



Gain -0214 



= 1-53 



Section I. — Halogens 4- Salts. 



Table XX I Y. — Positive metal, Zinc. 



Strength same as in Table XXII. 



Ingredients. 



E.M.F. 



Mixture, 



E.M.F. 



Calculated 

 E.M.F. 



Change of 

 E.M.F. 



Per 

 cent. 



CI. 



Br. 

 I. 



KOI. 



1-9250 

 1-8706 

 1-4416 

 1-1927 



C1+KC1. 

 Br+KCl. 

 I +KC1. 



1-8134 



1-69328 



1-3558 



1-4290 

 1-5437 

 1-3500 



Gain '3844 = 

 „ -1495 



„ -0058 



269 



9-684 

 •43 



KBr. 

 EX 



1-1556 

 1-14702 



Br + KBr. 

 I +KI. 



1-7333 

 1-2929 



1-443 

 1-2747 



Gain -2904 = 

 „ -0181 



20-12 

 1-42 



XNG 3 . 



1-13844 



Br+KNO r 

 I +KNO3. 



1-79338 

 1-3558 



1-4620 



1-3072 



Gain \3313 = 

 „ -0486 



22-66 

 3-71 



KMn0 4 . 



13844 



Br+KMn0 4 

 I +KMn0 4 . 



1-8134 

 1-4158 



1-5474 



1-4098 



Gain -266 = 

 „ -006 



17-18 

 •42 



ZnS0 4 . 



113558 



2Br+ZnS0 4 

 2I+ZnS0 4 . 



1-7562 

 1-3415 



1-5019 

 1-3228 



Gain -2543 = 

 „ -0187 



16-93 

 1-41 



: 2161 



K 2 C0 3 . 



1-0898 



C1+K 2 C0 3 . 



1-6704 



1-3735 



Gain -2969 = 



