5. Optically obtained the following experimental data:
Turbidity 105, m-1 2.0 5.0 11.5 13.7 15 16.2 18.6
Alcohol concentration g/l 0.05 0.1 0.2 0.3 0.4 0.5 0.7
Determine graphically the critical micelle concentration (CMC) of a sodium oleate solution when hexyl alcohol is introduced into it.

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