What is the critical micelle concentration of detergent?
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Micelles only form above critical micelle temperature. For example, the value of CMC for sodium dodecyl sulfate in water (no other additives or salts) at 25 °C, atmospheric pressure, is 8x10−3 mol/L. With increase in concentration of surfactant there will be decrease in surface tension.
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Critical micelle concentration (CMC) is defined as the concentration of detergents above which micelles are spontaneously formed. ... For non-ionic detergents the CMC is relatively unaffected by ionic strength, but increases significantly with higher temperature.
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