5.5. According to the measurement of the surface tensio
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5.5. According to the measurement of the surface tension of aqueous solutions of sodium dodecyl sulfate at various temperatures, determine the CMC, the effect on the CMC of a temperature increase:
lgC -2.4 -2.18 -2.08 -2.03 -2.01 -1.99 -1.95 -1.90 -1.88 -1.82
20 ° C 58 50 - 44 44 44 41 44 - 44
60 ° C 54 47 43 42 41 41 41 41 41 41
90 ° C 49 40 38 - - 35 29 29 29 29
Surface tension b in Nm / m. Surfactant concentration is expressed in mol / L.
lgC -2.4 -2.18 -2.08 -2.03 -2.01 -1.99 -1.95 -1.90 -1.88 -1.82
20 ° C 58 50 - 44 44 44 41 44 - 44
60 ° C 54 47 43 42 41 41 41 41 41 41
90 ° C 49 40 38 - - 35 29 29 29 29
Surface tension b in Nm / m. Surfactant concentration is expressed in mol / L.
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