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Theory Manual Version 3.6
 Subsection 2.10.1: Solid Matrix and Solid-Bound Molecular Constituents Up Section 2.10: Chemical Reactions Subsection 2.10.3: Mixture with Negligible Solute Volume Fraction 

2.10.2 Solutes

Solutes are denoted generically by . In chemistry solute content is often represented in units of molar concentration (moles per fluid volume). It follows that solute molar concentration and molar supply are related to and via The molar flux of constituent relative to the solid is given by where it may be noted that . Combining these relations with Eqs.(2.10-4)-(2.10-5) produces the desired form of the mass balance for the solutes, This form is suitable for implementation in a finite element analysis where the mesh is defined on the solid matrix.
 Subsection 2.10.1: Solid Matrix and Solid-Bound Molecular Constituents Up Section 2.10: Chemical Reactions Subsection 2.10.3: Mixture with Negligible Solute Volume Fraction