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HCl vs HF

Posted: Sun Nov 24, 2019 6:48 pm
by Andrea_1H
Why is HCl a stronger acid than HF?

Re: HCl vs HF

Posted: Sun Nov 24, 2019 7:02 pm
by Jessica Booth 2F
F is more electronegative than Cl so it is less likely to give off the H+ ion. This means that HCl can disassociate easier, making it the stronger acid.

Re: HCl vs HF

Posted: Sun Nov 24, 2019 7:07 pm
by Catherine Daye 1L
Because fluorine has a higher electronegativity than chlorine, its bond with hydrogen is stronger. Therefore, HCl dissociates more easily, making it a stronger acid due to its complete ionization.

Re: HCl vs HF

Posted: Sun Nov 24, 2019 7:08 pm
by Isabella Dal Porto 1H
The hydrogen-chlorine bond in HCl is very weak and it completely dissociates in water. This qualifies HCl as a strong acid. On the other hand, the bonding in HF is relatively strong. Thus, it only partially dissociates in water and makes it a weak acid.

Re: HCl vs HF

Posted: Sun Nov 24, 2019 10:56 pm
by Natalie C 1K
the electronegativity of chlorine is less than fluorine, so HCl is the stronger acid, because it can dissociate more easily than HF

Re: HCl vs HF

Posted: Tue Nov 26, 2019 5:23 pm
by Joanne Lee 1J
The more electronegative an element is, the less acidic it will be when bonded with a hydrogen. Higher acidity molecules will be more likely to give off hydrogen atoms and less electronegative elements are less likely to do so. Therefore, since CL is less electronegative than F, it is more acidic and more likely to give off a hydrogen atom.

Re: HCl vs HF

Posted: Wed Nov 27, 2019 5:39 pm
by Natalie Nartz 4F
HCl is a stronger acid than HF. Since the fluorine atom is more electronegative the attraction between H and F will be greater than H and Cl, meaning that HCl will dissociate more likely than HF, making it a stronger acid

Re: HCl vs HF

Posted: Wed Nov 27, 2019 11:39 pm
by WesleyWu_1C
Besides looking at the electronegativity, you can also look at the bond strengths. Since Cl has a larger atomic radius than F, the bond between HCl would be longer than the bond between HF. A longer bond means a weaker bond, so it would be easier for the H to be broken off the HCl than HF. Since it's easier to break off this H on HCl, there would be more dissociation for HCl, which makes HCl be a stronger acid.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 2:33 am
by chrischyu4a
Chlorine has a larger atomic radius than Fluorine which makes it easier for chlorine to lose its hydrogen atom making it a stronger acid than fluorine.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 3:03 am
by andrewcj 2C
Bond strengths is the most-correct reason that HCl is a stronger acid compared to HF. If we only consider electronegativity, we only focus on how strongly F can pull H's electron, which doesn't necessarily imply how easy it is to pull the proton off of HF.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 1:55 pm
by Lauren Tanaka 1A
HCl is a stronger acid than HF because Cl has a larger atomic radius than F therefore the bond between the H and Cl would be longer than in HF. This makes the bond weaker since it is longer making it easier to break the bond between HCl compared to HF. The bond will dissociate more in HCl than in HF making it a stronger acid.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 2:15 pm
by Jasmine Vallarta 2L
Cl is bigger than F; F is more electronegative

Re: HCl vs HF

Posted: Fri Nov 29, 2019 2:32 pm
by Callum Guo 1H
HCL is a strong acid

Re: HCl vs HF

Posted: Fri Nov 29, 2019 2:44 pm
by KaleenaJezycki_1I
Jessica Booth 4B wrote:F is more electronegative than Cl so it is less likely to give off the H+ ion. This means that HCl can disassociate easier, making it the stronger acid.


This exactly explains why, but in addition HCl is a stronger acid than HF because HCl has a longer/weaker bond between the H and Cl making it easier to donate a H+. Also as the atoms go down the periodic table their size increases causing bond lengths to increase, saying that acidity decreases down the row

Re: HCl vs HF

Posted: Fri Nov 29, 2019 2:58 pm
by Tyler Angtuaco 1G
HCl has a longer bond between the two atoms, meaning that it is weaker and the H atom is easier to dissociate.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 4:06 pm
by RoshniVarmaDis1K
The HCl bond is longer than the HF bond. This means that it dissociates more easily than the HF bond, so it is a relatively stronger acid.

Re: HCl vs HF

Posted: Fri Nov 29, 2019 9:21 pm
by Edmund Zhi 2B
HCl is larger and less electronegative than HF. The bond length is therefore longer and less strong, and easier to dissociate in water, where as the H and F are very tightly bonded in H-F

Re: HCl vs HF

Posted: Fri Nov 29, 2019 9:27 pm
by Alexa Hernandez 3k
CL IS BOTH LARGER AND LESS ELETRONEGATIVE

Re: HCl vs HF

Posted: Sat Nov 30, 2019 7:42 am
by HuyHa_2H
Cl is less electronegative than F which makes it easier to dissociate which makes HCl the stronger acid.

Re: HCl vs HF

Posted: Sat Nov 30, 2019 10:08 am
by anjali41
HCl is a stronger acid because it is lower on the periodic table, indicating that it is less electronegative and larger. This makes it easier to dissociate, making it a stronger acid. HF for this reason is often not considered a strong acid.