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Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure1 Mark
Question
Why KHF2 exists but KHCl2 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, KHF2 exists but there is no H-bonding in $\text{H}-\text{Cl}.$ So, $\text{HCl}^-_2$ ion does not exist and hence, KHCl2 also does not exist.

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