. Sulphite waste liquor and its possible utilization ... apsed, min Temp. °C I2 sol. cc. per cc. liquor 0 44 11 88 21 89 31 89 45 88 Original 1 quor, 25 cc. 25 cc. of sodium hydroxide solution required cc. of H2S04 solution forneutralization with phenolphthalein as indicator. Therefore wereadded each time to neutralize the NaOII before titrating. 1 cc. of standard I» solution equivalent to mg. of S02. TABLE IV. (Liquor A) Time mg. of S02 per elapsed, min. cc. I2 sol. cc . of liquor 0 1 3 5 16.
. Sulphite waste liquor and its possible utilization ... apsed, min Temp. °C I2 sol. cc. per cc. liquor 0 44 11 88 21 89 31 89 45 88 Original 1 quor, 25 cc. 25 cc. of sodium hydroxide solution required cc. of H2S04 solution forneutralization with phenolphthalein as indicator. Therefore wereadded each time to neutralize the NaOII before titrating. 1 cc. of standard I» solution equivalent to mg. of S02. TABLE IV. (Liquor A) Time mg. of S02 per elapsed, min. cc. I2 sol. cc . of liquor 0 1 3 5 10 15 25 40 60 Room temperature 23° C. 1 cc. of standard I2 solution equivalent to mg. of S02. TABLE V. (Liquor B)Timeelapsed, min. I2 sol. cc. 0 ... 1 10 15 25 40 60 100 130 Ro< m temperature 23° C. 1 cc. of standard solution of I2 equivalent to mg SO FIG. Y mg. of S02per cc. 10 20 30 40 T/me in Minutesn 50 60 of the equilibrium with the change of temperature. Were the in-crease in amount of S02 split out due to such a temperature dis-placement of the equilibrium, then reversion to the original tem-perature should result in a decrease to the amount split out at theoriginal temperature. Therefore, the reaction at the higher tem-perature must include a different one from that at the lower tem-perature. Table VI and Figure 6 show the splitting out of addi-tional S02 when the temperature is raised. TABLE VI Time mg. S02 elapsed, min. Temp., CC I2 sol. cc. per cc. liquor 0 23 1 23 3 23 5 23 10 23 IS 23 25 23 40 23 60 23 90 23 91 26 93 32 95 38 53 105 58 115 74 130 85 140 87 150 89 160 89 170 89 1 c
Size: 2315px × 1079px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectwoodpul, bookyear1922
