Why is HCl considered a stronger acid than HF?

[Chem_Mod]

Why is HCl considered a stronger acid than HF?

[Chem_Mod]

HF is a weaker acid because of strong hydrogen bonding with water molecules that takes a great amount of energy to break. Also, there is a substantial loss in entropy when HF dissociates. This is due to the F- anion (with its high charge density) instilling a high degree of order in the solution. Generally, greater entropy is favored in a system (more on that when you cover thermodynamics).

[605823283]

HF is weaker because Flourine is more electronegative than chlorine

[Matthew Nguyen 2F]

The strength of an acid is related more to how well it dissociates (how well it turns into its ions) in water. The smaller the radius of these ions, the harder it is for the atoms in the acid to dissociate. HCl is stronger because it has a larger atomic radius for Cl^- than F^-. This means it dissociates easier, thus making it a stronger acid.

[Elsie_Lin_2K]

HCl is considered a stronger acid because it is more electronegative than HF. The strength of an acid is determined by the strength of the bond between the molecule. HCl will completely dissociate due to the weaker bond making it a stronger acid as opposed to HF which has a stronger bond making it less likely to dissociate.

[Junyong Wu]

Because F has stronger electronegativity than Cl.

[Mahli Martinez 2I]

The strength of an acid is reflected by how completely it dissociates in water. The bond between HF is stronger due to Fluorine's higher electronegativity, so it won't dissociate as much as HCl. Thus, HCl is a stronger acid.

[Madison Kiggins 1E]

Hi, like some of the others have mentioned, F has a higher electronegativity than Cl, and because of this, the bond between HF is stronger than that of HCl. Since the bond is stronger, it will not dissociate as much in water. The strength of an acid is measured by how much it dissociates in water. Since HF does not dissociate as much as HCl, it is a weaker acid.

[Ryan Lafferty 1L]

Since F has a higher electronegativity than Cl, the bond in HF is stronger. This means HF dissociates less in water, making HCl a stronger acid.

[Aaron Martinez]

The strength of acids and bases is defined by how well they dissociate in H2O. Since fluorine has a higher electronegativity, it is going to be harder to separate HF. HCl will be easier to separate because chlorine is larger, so the molecules will split apart more, making it stronger.

[Denise Chavez 2G]

HCl is considered a stronger acid than HF because HF has a stronger bond meaning it will not dissociate like HCl does due to the HF has a higher electronegativity.

[August Blum Dis 3D]

Since the HCl bond is a longer (and thus weaker) bond, its bond breaks easier and thus is more likely to dissociate.

[Alessandra Marotta 3L]

HCl is considered a stronger acid than HF because F is more electromagnetic than Cl and HF has hydrogen bonding, making it a weaker acid.

[Matthew Vu 3C]

HCl is stronger because since it has a longer bond length, it is easier to break and will dissociate into more H+ ions. More H+ ions means it is more acidic.

[Sidharth Paparaju 3B]

HCl is stronger than HF since the H--F bond in HF is much smaller (and hence stronger) than the H--Cl bond in HCl, which means that HF is less likely/requires more energy to lose the H--and we know that strong acids are more likely to disassociate (lose the H+).

[Crystal Ma 2J]

the bond between H and F is stronger so it is a weaker acid!

[Jessica Li 1G]

HCl is a stronger acid than HF since the H-F bond is stronger than that of H-Cl because of Fluorine's higher electronegativity. Additionally, HF has a smaller atomic radius than HCl, making it easier for HCl to dissociate in water compared to HF.

[indigoaustin 3H]

HCl is a stronger acid than HF because acid strength describes the tendency of an acid to dissociate. HF has less of a tendency to dissociate because the bond is stronger since F is very electronegative. HCl is stronger and will dissociate more easily because its bond is longer and weaker.

[HaleyC 2F]

HCI is a stronger acid because the electronegativity of F is much higher than chlorine which means that HCI dissociates more in water than HF does.

[LukeYing_3H]

HCl is considered a stronger acid because HF has stronger bonds due to a higher electronegativity difference, which means they're less likely to dissociate and a tendency for a dissociation is the measure of an acid's strength

[Arad_Badiee_2B]

When looking at the bond strength, something with less bond strength would be a stronger acid. Therefore, since HCl has a weaker bond strength than HF, it is considered a stronger acid.

[gracebinder3I]

Hi!
HCl is a stronger acid than HF because the bond length is longer. A weak acid is classified by its ability to retain H+ and not dissociate into individual ions. HCl has a longer bond length (because Cl has a larger radius than F), so it is easier for the acid to dissociate into H+ and Cl-. It is a general rule that the shorter the bond length, the weaker the acid.
I hope this helps!

[cnyland]

Acid strength can be related to the atomic radius trend: as atomic radius increases, the easier it is for these atoms to dissociate, so they are defined as stronger, and vice versa. F is a highly electronegative, small atom, and although Cl is also very electronegative and small, F is slightly smaller, meaning it dissociates a little bit less, and HCl is considered stronger than HF

[kylanjin]

When comparing acids like HF and HCL that have elements within the same group, the general trend follows atomic radius. Because Cl has a larger atomic radius than F, the bond length is longer and therefore easier to break, making it easier for HCL to release H+ into solution and making it a stronger acid.

[Janys Li - 1L]

Hi,

HF is a stronger acid than HCl because it has a smaller atomic radius than HCl. Larger atomic radius means that bond length is longer and weaker. This makes it easier to break HCl bond and makes it a stronger acid.

[kareena_prasad]

HCl is a stronger acid because it is easier to break the bond between hydrogen and chloride than it is to break the bond between hydrogen and fluorine.

[205819952]

Because HCl is more electronegative than HF, it is considered a stronger acid.

[Neha Jonnalagadda 2D]

HCl is a stronger acid than HF because the bond strength of H-F is greater meaning that it is less likely to dissociate, making it a weaker acid.