CMC 5.o

Surfactant & Salt Thermodynamics Dashboard

Full Dissertation Toolkit — CMC • Counterion Binding • Salt Effects • Multiple Plots • Corrin-Harkins Validation

01 · Raw Conductivity Data

Quick Load Preset (different salt conditions) Pure SDS in Water (~8.3 mM CMC) SDS + 50 mM NaCl SDS + 10 mM CaCl₂ concentration (mM), conductivity (μS/cm) — one pair per line

02 · Corrin-Harkins Salt Predictor

Counterion Ca²⁺ (Calcium) Mg²⁺ (Magnesium) NH₄⁺ (Ammonium) Na⁺ (Sodium) Salt Concentration (mol/L)

03 · Thermodynamic Parameters

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CMC (mM)

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Counterion Binding β

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Ionization α

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Avg R²

04 · Salt Effect Collection Multi-Experiment Mode

After each analysis, enter the salt concentration used and click “Add to Collection”. This builds your dissertation plots automatically.

Salt concentration for current run (mol/L)

05 · Specific Conductivity κ vs Concentration Williams Method

06 · Differential Conductance dκ/dc vs √c Micellar Transition

07 · Molar Conductivity Λ vs √c Additional Transition Insight

08 · Salt Effect Analysis — Comparative Plots

CMC vs Salt Concentration

log(CMC) vs log[Salt] — Corrin-Harkins Validation

09 · Dissertation Interpretation Guide

• Salt effect on CMC: Added salt lowers CMC dramatically (electrostatic screening).
• Divalent vs monovalent: Ca²⁺/Mg²⁺ lower CMC far more than Na⁺ at same ionic strength.
• log(CMC) vs log[salt] slope: Slope ≈ –0.5 to –1.0 (theoretical B in Corrin-Harkins equation).
• β increases with salt: More counterions bind to micelle surface at higher salt levels.
• Use the molar conductivity plot when the κ vs c transition is subtle.