Question

Is hydrogen bonding a reason for existence of khf2 but not khcl2

Answer 1

Welcome dear,

● KHF2 exists but KHCl2 and KHBr2 don't because ?

- Fluorine is more electronegative than that of both Cl and Br.

- Higher electronegativity implies stronger hydrogen bonding, thus F bonds with H to form HF2- ion.

- Therefore, K+ cation combines with HF2- anion to form ionic compound KHF2.

- Due to less electronegativity, Cl and Br can't form HCl2- and HBr2- ions respectively.

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