E6: Activity Coefficients at 25°C
- Page ID
- 44398
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| Ion | Effective Radius \(R_x\) | Activity Coefficients at Ionic Strengths | ||||
|---|---|---|---|---|---|---|
| 0.001 | 0.005 | 0.01 | 0.05 | 0.1 | ||
| H3O+ | 900 pm | 0.967 | 0.933 | 0.914 | 0.86 | 0.83 |
| Li+ , C6H5COO‐ | 600 pm | 0.9 | 0.929 | 0.907 | 0.84 | 0.80 |
| Na+ , IO3 ‐ , HSO3 ‐ , HCO3 ‐ , H2PO4 ‐ , H2AsO4 ‐ , C2H3O2 ‐ 4 | 400‐450 pm | 0.964 | 0.928 | 0.902 | 0.82 | 0.78 |
| OH‐ , F ‐ , SCN‐ , HS‐ , ClO3 ‐ , BrO3 ‐ , IO4 ‐ , MnO4 ‐ | 350 pm | 0.964 | 0.926 | 0.900 | 0.81 | 0.76 |
| K+ , Cl‐ , Br‐ , I ‐ , CN‐ , NO2 ‐ , NO3 ‐ , HCOO‐ | 300 pm | 0.964 | 0.925 | 0.899 | 0.80 | 0.76 |
| Rb+ , Cs+ , Tl+ , Ag+ , NH4 + | 250 pm | 0.964 | 0.924 | 0.898 | 0.80 | 0.75 |
| Mg2+, Be2+ | 800 pm | 0.872 | 0.755 | 0.690 | 0.52 | 0.45 |
| Ca2+, Cu2+, Zn2+, Sn2+, Mn2+, Fe2+, Ni2+, Co2+ | 600 pm | 0.870 | 0.749 | 0.675 | 0.48 | 0.40 |
| phthalate2‐ | 600 pm | 0.870 | 0.749 | 0.675 | 0.48 | 0.40 |
| Sr2+, Ba2+, Cd2+, Hg2+, S 2‐ | 500 pm | 0.868 | 0.744 | 0.670 | 0.46 | 0.38 |
| Pb2+, CO3 2‐ , SO3 2‐ , C2O4 2 | 450 pm | 0.868 | 0.742 | 0.665 | 0.46 | 0.37 |
| Hg2 2+, SO4 2‐ , S2O3 2‐ , CrO4 2‐ , HPO4 2‐ | 400 pm | 0.867 | 0.740 | 0.660 | 0.44 | 0.36 |
| Al3+, Fe3+, Cr3+, La3+, Ce3+ | 900 pm | 0.738 | 0.540 | 0.440 | 0.24 | 0.18 |
| PO4 3‐ , [Fe(CN)6] 3‐ | 400 pm | 0.725 | 0.500 | 0.400 | 0.16 | 0.095 |
| Th4+, Zr4+, Ce4+, Sn4+ | 1100 pm | 0.588 | 0.350 | 0.255 | 0.10 | 0.065 |
| [Fe(CN)6] 4‐ | 500 pm | 0.570 | 0.310 | 0.200 | 0.048 | 0.021 |