On the Speed of the Liberation of Iodine in Mixed Solutions of Potassium Chlorat
On the Speed of the Liberation of Iodine in Mixed Solutions of Potassium Chlorat
Herman Schlundt
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3 cc. Water .. . 186. 7 cc. 400. 0 cc. Cubic centimeters Duration of reac- tion in minutes. Cubic centimeters of solution taken. of n. Na, S f 8 used in each titration. Per cent, of Iodine liberated. 20 20 15. 3 38. 3 50 20 24. 55 61. 4 100 20 (C S 2 ) 31. 7 79. 3 100 20 31. 8 79. 5 200 20 37. 15 92. 9 300 20 38. 85 97. 1 460 20 39. 55 98. 9 After 24 hours 20 cc. Of this mixture kept at the ordinary temperature of the laboratory required 0. 5 cc. Of twentieth normal sodium thiosulphate. 1 Curve... D, Figure 3. 8CHLUNDT SPEED OF THE LIBERATION OF IODINE 19 SECTION C. This section embraces a series of experiments in which excesses of both the hydrochloric acid and potassium iodide enter, the amount of potassium chlorate remaining constant. The results obtained have a direct bearing upon analytical methods as these are the conditions under which chlorates are estimated. (1) Series in which botJi the H Cl and K I are doubled* the K Cl O 3 remaining constant and tenth normal, 1 Excess K Cl O 3 + 6 KI + 6 H Cl + 6 H Cl + 6 K I.
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