Table 3. List of Chemical Reactionsa.
| reaction | log Keq | k+ |
|---|---|---|
| Al2Si2O7 + 4OH– + 5H2O → 2Al(OH)4– + 2H3SiO4 | 19.52 | 1.43 × 10–4 |
| Na2A2lSi2O8·5H2O + 2OH– + H2O → 2Na+ + 2Al(OH)4– + 2H3SiO4 | –9.55 | 5.50 × 10–15 |
| NaAlSi2O6·H2O + 2OH– + 3H2O → Na+ + Al(OH)4– + 2H3SiO4 | –7.70 | 5.50 × 10–15 |
| NaAlSi2O6·4H2O + 2OH– → Na+ + Al(OH)4– + 2H3SiO4 | –4.14 | 5.50 × 10–15 |
| Na2Al2Si3O10·2H2O + 3OH– + 5H2O → 2Na+ + 2Al(OH)4– + 3H3SiO4 | –17.66 | 5.50 × 10–15 |
| Na4Al3Si3O12(OH)·2H2O + 2OH– + 7H2O → 4Na+ + 3Al(OH)4– + 3H3SiO4 | –3.64 | 5.50 × 10–15 |
| H3SiO4– + OH– → H2SiO4 + H2O | 0.90 | 6.03 × 10–2 |
a
Keq: equilibrium constant; k+: rate constant, expressed as mol m–2 s–1.