— 28 — 



23) 1=2,8025 :^°*^%t^^*' 



E ' 1 P = 6,25 volts 



= 2,8011 t =150,3 



= 2,8082 N = 1100 



= 2,7965 



Moyenne = 2,8021. 



^^) ^=28022 5SO,H,+5H,0 



E ' A P = 6,25 volts 



= 2,8017 t = 150,4 



= 2,8185 N = 1100 



= 2,8323 



Moyenne = 2,8137. 



^^' I = 2,7692 



= 2,7950 



= 2,7582 



= ^^^^^Q 5SO4H2 + IOH2O 



Moyenne = 2,7621 a P = 6,25 volts 



t = 140,8 

 26) Ç ^ ^^rj.^^^ N = 1100 



= 2,7282 



= 2,7522 



= 2,7633 



Moyenne = 2,7431. 



C ^„^o/ Eau 



17) Moyenne -g = 2,7584 ^ p _ ^3^5 ^^^^ 



18) Moyenne ^ = 2,7706 



f = 130,5 



