WORK OF M. R. SCHMIDT. 



145 



POTASSIUM IODIDE. 



Kahlbaum's pure potassium iodide was recrystallized, and dried to constant 

 weight at 150. It showed no appreciable impurity. 



Table 109. Conductivity of Potassium Iodide in Glycerol at 25, 35, and 4.5. 



Table 110. Conductivities of Potassium Iodide in Various Solvents at 25 and 35* 



V 



Water. 



Mp25 c 



o-o Temp. 

 ^ 3o coef. 



Mixture of 25 per 



cent glycerol and 



water. 



/'> 



25 | m 35 



Temp, 

 coef. 



Mixture of 50 per 



cent glycerol and 



water. 



M P 25 ju35 c 



Temp, 

 coef. 



Mixture of 75 per 



cent glycerol and 



water. 



Mc 25 



Mb 35 



Temp, 

 coef. 



10 

 50 

 100 

 200 

 400 

 800 

 1,600 



125.6 

 131.6 

 133.6 

 135.8 

 137.2. 

 138.9 

 140.0 



150 

 156 

 159 

 162 

 163 

 165 

 167 



.4 0.0189 

 .5 0.0189 

 ,3| 0.0192 

 0.0193 

 0.0193 

 0.0194 

 0.0196 



61.5 

 64.3 

 65.4 

 66.9 

 67.0 

 68.1 

 68.7 



76.6 

 80.1 

 81.7 

 83.4 

 83.9 

 85.2 

 S6.0 



0.0244 

 0.0246 

 0.0249 

 0.0249 

 0.0251 

 0.0252 

 0.0252 



23.9 

 24.4 

 24.6 

 24.9 

 25.1 

 25.4 

 25.5 



30.8 

 32.3 

 32.8 

 33.2 

 33.4 

 34.1 

 34.5 



0.0289 

 0.0327 

 0.0333 

 0.0332 

 0.0336 

 0.0340 

 0.0351 



4.94 

 5.13 

 5.25 

 5.14 

 5.42 

 5.48 

 5.20 



7.66 

 7.98 

 8.18 

 8.01 

 8.50 

 S.56 

 8.02 



0.0552 

 0.0555 

 0.0559 

 0.0559 

 0.0569 

 0.0563 

 0.0545 



10 

 50 

 100 

 200 

 400 

 800 

 1,600 



Mixture of 25 per 



cent glycerol and 



ethyl alcohol. 



Mixture of 50 per 



cent glycerol and 



ethyl alcohol. 



9.50 

 11.35 

 12.12 



12.88! 

 13.40 

 13.99 

 14.62 



12 

 14 

 15 

 16 

 17 

 18 

 18 



27 

 68 

 79 

 87 

 56 

 33 

 70 



0.0291 

 0.0293 

 0.0303 

 0.0309 

 0.0310 

 0.0310 

 0.0278 



3.87 

 4.31 



4.66 



4.78 

 4.96 

 4.98 



5.67 

 6.31 



6.93 

 7.03 

 7.29 



7.28 



0.0466 

 0.0466 



0.0484 

 0.0470 

 0.0471 

 0.0460 



Mixture of 75 per 



cent glycerol and 



ethyl alcohol. 



1.19 

 1.19 

 1.33 

 1.39 

 1.42 

 1.46 

 1.49 



2.05 

 2.11 

 2.28 

 2.37 

 2.43 

 2.51 

 2.50 



0.0723 

 0.0770 

 0.0717 

 0.0707 

 0.0709 

 0.0709 

 0.0700 



V 



10 

 50 

 100 

 200 

 400 

 800 

 1,600 



Methyl alcohol. 



Mixture of 25 per 



cent glycerol and 



methyl alcohol. 



65.5 

 79.6 

 84.0 

 90.9 

 94.8 

 98.0 

 100. S 



72.9 0.0114 

 89. 1| 0.0120 

 0.0121 

 0.0122 

 0.0125 

 0.0134 

 0.0125 



94.1 

 102.1 

 106.6 

 111.2 

 113.4 



26.4 

 30.6 

 31.8 

 33.3 

 34.2 

 35.3 

 35.7 



32.2 

 37.3 

 38.6 

 40.5 

 41.9 

 43.0 

 44.1 



0.0219 

 0.0220 

 0.0218 

 0.0217 

 0.0224 

 0.0218 

 0.0233 



Mixture of 50 per 



cent glycerol and 



methyl alcohol. 



Mixture of 75 per 



cent glycerol and 



methyl alcohol. 



9.1 

 10.2 

 10.4 

 10.8 

 11.1 

 11.5 

 11.8 



12.5 

 13.9 

 14.2 

 14.8 

 15.1 

 15.6 

 16.1 



0.0366 

 0.0365 

 0.0363 

 0.0364 

 0.0363 

 0.0364 

 0.0364 



2.08 

 2.28 

 2.39 

 2.35 

 2.40 

 2.56 

 2.46 



3.41 

 3.68 

 3.90 

 3.82 

 3.90 

 4.27 

 4.07 



0.0635 

 0.0619 

 0.0635 

 0.0624 

 0.0631 

 0.0663 

 0.064S 



Tables 109 and 110 give the conductivities of potassium iodide in glycerol and in 

 the mixed solvents. Again, the conductivities increase nearly regularly with dilu- 

 tion, and are a little higher than those of lithium bromide, and about 50 per cent less 



