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Generally, the process of turning $\ce{HX}$ into $\ce{H+}$ and $\ce{X^-}$ can be broken into 2 hypothetical steps [...] Indeed, this process is slightly simplified because acidities are typically measured in solution, whereas your thermodynamic cycle only deals with gas-phase energetics. However, in the present case, it's actually enough to look at gas-...


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Here is a bigger chunk of the periodic table with acid dissociation constants of the hydrides: Source: Libretexts The authors claim that the two factors are electronegativity (how much of a positive partial charge the hydrogen has in the covalent bond) and bond strength (expressed as estimated homolytic cleavage energy). There is no strong anomaly for the ...


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