Physical properties of fluorosulfonic acid

Equation 9.54 shows the self-ionization of HSO3F for which Kse]f = 4.0 x 10 .  

Sulfuric acid is a highly acidic solvent and most other acids are neutral or behave as bases in it. We have already noted the basic behaviour of HNO3. Initial proton transfer (equation 9.8) leads to the formation of the protonated acid [H2N03], and in such cases, the resulting species often eliminates water (equation 9.9). Protonation of H2O follows (equation 9.10). 

The species H[B(HS04)4] has not been isolated as a pure compound, but a solution of this add can be prepared by dissolving boric acid in oleum (equation 9.51) (see Section 16.9) and can be titrated conductometrically against a solution of a strong base such as KHSO4 (equation 9.52). 

In a conductometric titration, the end-point is found by monitoring changes in the electrical conductivity of the solution.  

Few species function as strong adds in H2SO4 medium. Perchloric acid (a potent add in aqueous solution) is essentially non-ionized in H2SO4 and behaves only as a very weak add. 

In some cases (in contrast to equation 9.48), the cations formed from carboxylic adds are unstable, e.g. HCO2H and H2C2O4 (equation 9.53) decompose with loss of CO. 

---

Table 8.7 lists some of the physical properties of fluorosulfonic acid, H8O3F, 8.14 it has a relatively long liquid range (Figure 8.2) and a high dielectric constant. It is far... 

Table 8.7 Selected physical properties of fluorosulfonic acid, HSO3F.

Sulfuric acid and fluorosulfonic acid Physical properties of sulfuric acid... 

---