Kaolinite Clay

• Aqueous solution

• Calcium hydroxide

• Triton X-100, 2.56E-2 mol/L (<CMC)

• Triton X-100, 1.53E-1 mol/L (<CMC)

• Triton X-100, 1.02 mol/L (>CMC)

The face of a clay particle is negatively charged, while the charge on the edge is a function of pH. The addition of calcium hydroxide increased the pH above the net zero charge for Kaolinite (4-5), thus causing a negative edge charge and collapsing the card house.

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