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Why pKa of propiolic acid is significantly lower than the pKa of propanoic acid?
due to propiolic acid having more s character than propanoic acid (sp hybridisation in the triple bond), it tends to be more electronegative than propanoic acid and therefore weakens the O-H bond allowing the H+ to dissociate easier, making it a stronger acid than propanoic acid
Why melting point of ethanoic acid is higher than propanoic acid?
The higher melting point of ethanoic acid compared to propanoic acid is due to stronger intermolecular forces in ethanoic acid caused by hydrogen bonding between the molecules. Ethanoic acid has a shorter carbon chain than propanoic acid, allowing the molecules to pack more closely together and form stronger interactions.
Why is proponoic acid weaker acidic than alcohol?
Propanoic acid is a stronger acid than alcohol because it can donate a proton more readily due to the presence of a carboxylic acid group which is more acidic compared to the hydroxyl group in alcohols. The presence of the oxygen in the carboxyl group stabilizes the resulting carboxylate ion formed after proton donation, making it easier for the acid to dissociate.
Is more than one structure possible for propanoic acid?
Yes, propanoic acid has only one possible chemical structure. Its chemical formula is C3H6O2 and it consists of a three-carbon chain with a carboxylic acid functional group (-COOH) attached at the end.
Is Nitric acid or Nitrous acid more acidic?
Nitric acid is more acidic than nitrous acid. This is because nitric acid has a lower pKa value (–1.3) compared to nitrous acid (3.3), indicating that nitric acid readily donates a proton in solution, making it a stronger acid.
Why pKa of propiolic acid is significantly lower than the pKa of propanoic acid?
due to propiolic acid having more s character than propanoic acid (sp hybridisation in the triple bond), it tends to be more electronegative than propanoic acid and therefore weakens the O-H bond allowing the H+ to dissociate easier, making it a stronger acid than propanoic acid
Why melting point of ethanoic acid is higher than propanoic acid?
The higher melting point of ethanoic acid compared to propanoic acid is due to stronger intermolecular forces in ethanoic acid caused by hydrogen bonding between the molecules. Ethanoic acid has a shorter carbon chain than propanoic acid, allowing the molecules to pack more closely together and form stronger interactions.
Why is proponoic acid weaker acidic than alcohol?
Propanoic acid is a stronger acid than alcohol because it can donate a proton more readily due to the presence of a carboxylic acid group which is more acidic compared to the hydroxyl group in alcohols. The presence of the oxygen in the carboxyl group stabilizes the resulting carboxylate ion formed after proton donation, making it easier for the acid to dissociate.
Is more than one structure possible for propanoic acid?
Yes, propanoic acid has only one possible chemical structure. Its chemical formula is C3H6O2 and it consists of a three-carbon chain with a carboxylic acid functional group (-COOH) attached at the end.
Is Nitric acid or Nitrous acid more acidic?
Nitric acid is more acidic than nitrous acid. This is because nitric acid has a lower pKa value (–1.3) compared to nitrous acid (3.3), indicating that nitric acid readily donates a proton in solution, making it a stronger acid.
Which is more acidic sulphuric acid or nitric acid?
Sulfuric acid is generally considered more acidic than nitric acid. This is due to sulfuric acid's ability to donate two protons in solution, making it a stronger acid. Nitric acid can only donate one proton.
Which is more acidic butanoic acid or 3 methyl butanoic acid?
3-methyl butanoic acid is more acidic than butanoic acid because the presence of the methyl group in 3-methyl butanoic acid increases the electron-withdrawing effect, making the molecule more acidic by stabilizing the conjugate base.
Which is more acidic formic acid or benzoic acid?
Formic acid is more acidic than benzoic acid. This is because formic acid has a simpler molecular structure with a hydrogen atom attached to a carboxyl group, making it easier to release the acidic hydrogen ion compared to benzoic acid, which has a more complex aromatic ring structure.
Why is salicylic acid more acidic than acetylsalicylic acid?
Salicylic acid dissociates in water to form a carboxylic acid group, making it more acidic compared to acetylsalicylic acid which has an ester group that is less acidic. The presence of the -OH group in salicylic acid contributes to its higher acidity compared to the -OR group in acetylsalicylic acid.
Which is more acidic hydrochloric acid or picric acid?
Hydrochloric acid is more acidic than picric acid. Hydrochloric acid fully dissociates in solution to release hydrogen ions, resulting in a lower pH compared to picric acid, which is a weaker acid that does not fully dissociate in solution.
Is vinegar more acidic than sulphuric acid?
Not at all, but it depends on how dilute the sulphuric acid, but usually no.
What is more acidic vinegar or citric acid?
Citric acid is more acidic than vinegar. The pH level of citric acid is around 2.2-3.5, while the pH level of vinegar is around 2.4-3.4. Therefore, citric acid has a slightly lower pH level, making it more acidic.
