Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure1 Mark
Question
Why $\mathrm{KHF}_2$ exists but $\mathrm{KHCl}_2$ does not?
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Answer
Due to H-bonding in HF, we have
$\text{H}-\text{F}\cdots\text{H}-\text{F}\cdots\text{H}-\text{F}\cdots$
This can dissociate to give $\text{HF}^-_2$ ion and hence, $\mathrm{KHF}_2$ exists but there is no H-bonding in $\text{H}-\text{Cl}.$ So, $\text{HCl}^-_2$ ion does not exist and hence, $\mathrm{KHCl}_2$ also does not exist.
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