Chemical Reactions: Carboxylic acids

The video tutorial discusses the reactions of carboxylic acids with metals and alkalis, highlighting the formation of salts and the release of gases like hydrogen and carbon dioxide. It explains the concept of equilibrium and dissociation constants, emphasizing the relationship between Ka and pKa values in determining acid strength. The tutorial also covers the factors influencing acidic strength, such as the ease of proton release and the stability of conjugate bases, comparing carboxylate and phenoxide ions.

What gas is released when carboxylic acids react with sodium bicarbonate?

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

Which of the following is a measure of the acidic strength of a carboxylic acid?

• Molarity

• pKa

• Density

• pH

What is the relationship between pKa and acid strength?

• Lower pKa means stronger acid

• Lower pKa means weaker acid

• pKa does not affect acid strength

• Higher pKa means stronger acid

Which ion is more stabilized due to resonance, leading to greater acidic character?

• Ammonium ion

• Hydroxide ion

• Phenoxide ion

• Carboxylate ion

What is the main reason carboxylate ions are more stable than phenoxide ions?

• They are larger in size

• They have equivalent resonance structures

• They have a higher pH

• They have more electronegative atoms