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The effect of pressure on the dissociation constant of hydrofluoric acid and the association constant of the NaF ion pair at 25°C
| Content Provider | Semantic Scholar |
|---|---|
| Author | Usha, A. V. Atkinson, Gordon |
| Copyright Year | 1992 |
| Abstract | The effect of pressure on the dissociation constant of hydrofluoric acid was determined by using the indicator technique at 25°C at an ionic strength of 0.1m over a pressure range of 1 to 2000 atm. A value of 3.14 for pKa* at I =0 was obtained by extrapolation to zero ionic strength at 1 atm. The pressure dependence yielded a partial molar volume change of −9.6 cm3-mol−1 and a compressibility change of — 35×10−3 cm3-mol−1 −atm−1 for the dissociation. The dependence of ionic strength on the association constant KA* of NaF was studied at 25°C and 1 atm. Extrapolation to I=0 yielded a pKA* of −0.78. The pressure dependence of KA* gave a change of volume of 3.26 cm3-mol−1 and a change in compressibility of 6×10−3 cm3-mol−1-atm−1 for the formation of the ion pair. |
| Starting Page | 477 |
| Ending Page | 488 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF00649700 |
| Volume Number | 21 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/BF00649700 |
| Alternate Webpage(s) | https://doi.org/10.1007/BF00649700 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
