Acid and bond strength

[Do Yeun Park]

Just to clarify, if a molecule has a strong bond, it's considered a weak acid because it is harder to break them apart?

[Konmal Ali 1G]

Yes, you are correct. Furthermore, the weaker the bond, the stronger the acid. This is because strong acids usually are made up of mostly ions which means that the bonds holding the molecule together must be weak. As a result, strong acids can easily break down into ions. Similar ideology applies to bases. Weak bonds equate to strong bases and vice versa.

[Veronica Larson- 1I]

Yes, that's right! If you have an acid that has a very short and strong bond it will be harder for them to break apart and dissociate into ions, which means that it's a weaker acid. If you have an acid with a longer, weaker bond, the atoms can dissociate more easily and therefore it's a stronger acid.

[austinchun]

Yes, when there is a strong bond, it is a weaker acid. You can also use this reasoning to differentiate why HF is considered a weak acid while HI, HCl, etc. are strong acids.

[Sarah Wang 1I]

Yes! Weak acids are mostly comprised of molecules and fewer ions as opposed to strong acids, so the bonds holding H and A together in weak acids must be strong.

[Jillian Sarquiz- 2B]

Yes that's correct! If the A-H bond is strong, then it is hard for H2O to remove the H+, making the acid weaker.

[Samantha Loc 1B]

yes, strong acids typically produce more H+, thus it makes sense that acids that do not produce as much H+ due to the larger bond strength would be considered weaker.

[Barbara Soliman 1G]

Yes, you are correct. The stronger and shorter the bond, the weaker the acid. Look at electronegativity trends to determine bond strength and length. The more electronegative it is, the stronger and shorter the bond is, therefore the weaker the acid is. Hope this helps!

[JohnathanH_1H]

That would be correct take HF for example it seems like it would be the strongest acid but it is not since the bond between H and F are much stronger than HBr for example which has a weaker bond

[trevina_brown_2A]

Yes that's right

[Sophia Kangavari 1D]

Yes, and to add on, it is also a weaker acid if the atomic radius is smaller, for example Fluorine has a smaller Atomic Radius than Iodine (since atomic radius increases as you go down the periods) and more surface area means that it will be easier to get in there and break the bond between HI, for example, than HF.

[Ryan Lafferty 1L]

Yep! An acid with a short and strong bond is considered a weak acid, while an acid with a long and weak bond is a strong acid.

[Wenhan Li_3d]

Yes, considering ionization of an acid. If an acid can be fully dissolved in water, it is a strong acid with longer and weaker bonds.

[Jonathan Alterman 1C]

Weaker bonds lead to stronger acids because acidity is determined by the ionization of the compound. If the compound dissociates easier into two ions such as H+ and Cl-, the acid is considered stronger because the dissociation into ions is quicker when placed into water than for another compound such as HF.

[gracebinder3I]

Hi!
You are correct! A weak acid is characterized by its ability to hold H+ such that it is more difficult to differentiate the acid into individual ions. Thus, the bond between the atoms will be stronger.
I hope this helps!

[Madison Nguyen 3L]

If an acid is short in length, it has a strong bond, making it more difficult to break apart and dissociate into ions. Therefore, shorter/stronger means a weaker acid BECAUSE it cannot dissociate easily. Atoms can dissociate more easily when the bond is weak and the length of the bond is long, making it a a stronger acid.

[elletruchan2I]

This is correct, but the term weak acid is largely based on the idea that it doesn't dissociate completely, which is a result of the strong bonds.

[Talia Tam 3L]

Yes, a strong acid dissociates (almost) completely in water.

[Jessica Li 1G]

Yes, because when there is a stronger bond, it is harder to break down into ions, so it is a weaker acid.

[Neha Jonnalagadda 2D]

Yes, as the bond strength decreases, the strength of the acid increases. This is because if an acid dissociates more, then it is considered stronger. If the bond strength is low, then a compound is more likely to dissociate.

[Arjan G 2H]

Yes! Strong acids are those that can completely ionize and dissociate when dissolved in water. Weak acids do not completely ionize and separate when in water. Typically, there are common strong acids, which you will have to memorize. But for weak acids, we can use different strategies to see which weak acid is stronger than the other when comparing two different ones. One of these being the longer the bond length or atomic radius of a weak acid, the stronger it is, because it is easier for the bonds to be separated, as it is not as closely bonded to the nucleus. I hope this helps!

[Esther Kim]

Yes you're correct :)

[Nomi Heidari-Bateni 2K]

Yes, the strength of an acid is its ability to dissolve in water to increase H3O+ ion concentration. If a molecule is held together by a stronger bond, it is less likely to break apart in water, and therefore less likely to increase H3O+ ion concentration.

[Nick Oscarson 1K]

Strong acids completely dissociate while weak acids do not. So, whenever a molecule has a strong bond, it's considered a weak acid because the strong bonds inhibit the acid from fully dissociating in solution since the bonds are harder to break.

[Iman Gauhar 3E]

Hi! Yes, if a bond is strong, then the acid is weak. This is because acids lose a proton, thus increasing the H3O+ concentration of a solution. If the bond is strong, then it will be less likely to lose the proton.

[Matthew Nguyen 3G]

Correct, as an acid is characterize by being able to be a proton donor. If the bond is strong that means it has less of an ability to lose a proton making it a "weak" proton.