Table of Contents
Why is benzoic acid stronger than acetic acid but weaker than formic acid?
It is all about the electron withdrawing/ donating nature of the acid’s functional groups. The more electron withdrawing the group, the stronger the acid will be. The more electron donating the weaker the acid will be.
Why is benzoic acid weak?
Due to the resonance structure of benzoic acid, power of leaving proton is restricted and that’s why its ability to leave proton is decreased. As we can see benzoic acid is a weak acid. So, it will dissociate partially in the solution and we know that the conjugate base of a weak acid acts as a strong base.
Which one is more acidic benzoic acid or acetic acid?
Benzoic acid is stronger acid than acetic acid.
Why formic acid is more stronger than benzoic acid?
Formic acid is stronger than benzoic acid because it has a lower pKa value (formic acid pKa = 3.751; benzoic acid pKa = 4.204; Acid dissociation constant). Formic acid has a C-H bond on the α Carbon atom (the Carbon in the -COOH group).
Which acid is stronger than Hcooh?
The stronger the acid, the larger the Ka, the more H3O+. The stronger the base, the larger the Kb, the more OH-….Acid (Base) Strength.
| Acid Name | Formula | Ka |
|---|---|---|
| Hydrofluoric | HF | 3.5 x 10-4 |
| Formic | HCOOH | 1.8 x 10-4 |
| Acetic | CH3COOH | 1.8 x 10-5 |
| Hypochlorous | HClO | 3.0 x 10-8 |
Which is the weakest acid?
Hydrofluoric acid is the only weak acid produced by a reaction between hydrogen and halogen (HF).
Which acid is stronger than benzoic acid?
Formic acid
Formic acid is stronger than benzoic acid because it has a lower pKa value. Formic acid does not have such a group of electron donors and is stronger than acetic acid. Formic acid is also a stronger acid than acetic acid.
Which is a stronger acid benzoic acid or acetic acid?
Why is benzoic acid ( p K a = 4.20) a stronger acid than acetic acid ( p K a = 4.76 ), even though the conjugate base in case of benzoic acid is destabilized due to electron donation through resonance. Whereas there is nothing of that sort operating in acetic acid; only inductive and hyperconjugative electron donation.
Why does the acidic strength decrease down the group?
Acidity of carboxylic acid depends on the type of substituent attached to it. An electron withdrawing group increases the acidity while an electron donating group decreases the acidity. The carboxylate ion obtained due to loss of proton should be stable. More the stability, more is the acidity.
Which is stronger, lactic acid or 2-hydroxypropanoic acid?
You can make a comparison to e.g. 2-Chloropropanoic acid (pKa 2.83) and 3-chloropropanoic acid. (pKa 3.98) The only difference between these 2 acids is the position of the chloro atom. Or lactic acid (2-hydroxypropanoic acid; pKa 3.08) and 3-hydroxypropanoic acid (pKa 4.51). In both pairs, the difference is a factor of more than 10.