Question

what are the attractive forces between the molecules of hf and hcl

Answer 1

Answer on Question #44464 – Chemistry – Other

Question

What are the attractive forces between the molecules of HF and HCl?

Answer

Both HF and HCl molecules are very polar: dipole moment of HF = 1.86 D and dipole moment of HCl = 1.05 D, so HF and HCl form permanent dipoles:

```

δ+ δ- δ+ δ-

H—F H—Cl

```

So, the attractive forces between the molecules of HF and HCl are dipole-dipole interaction.

```

δ+ δ- δ+ δ-

H—F H—F

```

The hydrogen bond is often described as a strong electrostatic dipole-dipole interaction. The attractive force between molecules of HF is hydrogen bonding. The interaction between molecules of HCl is not strong enough to be called hydrogen bonding, so it is just dipole-dipole interaction.

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