The negative charges associated with montmorillonite clay crystals are due mostl

Question

The negative charges associated with montmorillonite clay crystals are due mostly to ______.

Question options:

A) OH groups on the external surface of the crystal

B) high pH associated with the formation of the mineral

C) substitution of Al for Mg in the tetrahedral sheet

D) isomorphous substitution of Mg for Al in the octahedral sheet

A) OH groups on the external surface of the crystal

B) high pH associated with the formation of the mineral

C) substitution of Al for Mg in the tetrahedral sheet

D) isomorphous substitution of Mg for Al in the octahedral sheet

Explanation / Answer

The negative charges associated with montmorillonite clay crystals are due mostly to.....

A) OH groups on the external surface of the crystal

B) high pH associated with the formation of the mineral

C) substitution of Al for Mg in the tetrahedral sheet

D) isomorphous substitution of Mg for Al in the octahedral sheet

Answer = D) isomorphous substitution of Mg for Al in the octahedral sheet.

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