Mineral acid intraconversion
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| To | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| az | bp | Sulfuric | Boric | Perchloric | Phosphoric | Hydroiodic | Hydrobromic | Hydrofluoric | Hydrochloric | Nitric | ||
| From | Sulfuric | 98% | 337 | Borax | Ca(ClO4)2 | Apatite | CaI2 | CaBr2 | Fluorite | CaCl2 | KNO3 | |
| Boric | 300 | — | Ca(ClO4)2 | K3PO4 | KI | KBr | KF | CaCl2 | KNO3 | |||
| Perchloric | 203 | — | Borax | K3PO4 | KI | KBr | KF | KCl | KNO3 | |||
| Phosphoric | 158(d) | MgSO4 | Borax | Ca(ClO4)2 | CaI2 | CaBr2 | Fluorite | CaCl2 | KNO3 | |||
| Hydroiodic | 57% | 127 | — | Borax | AgClO4 | — | HgBr2 | AgF | HgCl2 | KNO3 | ||
| Hydrobromic | 48% | 124 | Electrolyze Sulfur | Borax | AgClO4 | — | — | AgF | CaCl2 | KNO3 | ||
| Hydrofluoric | 35% | 120 | — | Borax | Ca(ClO4)2 | — | CaI2 | CaBr2 | CaCl2 | KNO3 | ||
| Hydrochloric | 20.2 | 110 | CuCl2 + SO2 | Borax | AgClO4 | — | — | — | AgF | KNO3 | ||
| Nitric | 68% | 83 | chamber process | Borax | — | — | — | — | — | — | ||
Cells with a dash (—) do not have a known direct path for conversion. A cation soluble for the column but insoluble for the row is ideal. Alternatively, convert the source acid to nitric acid, use that to make sulfuric acid, and use that to make the target acid.