This deep dive covers The Carboxylic Acid Family Structure within Carboxylic Acids for GCSE Chemistry. Revise Carboxylic Acids in Organic Chemistry for GCSE Chemistry with 22 exam-style questions and 15 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
🔬 The Carboxylic Acid Family Structure
General Formula: CₙH₂ₙ₊₁COOH (or CₙH₂ₙO₂)
- All carboxylic acids contain the -COOH functional group
- The carboxyl group is always at the end of the carbon chain
- Example: Ethanoic acid = CH₃COOH = acetic acid (vinegar)
The First Four Carboxylic Acids (Essential to memorise!):
Figure 1: The -COOH group contains both a C=O (carbonyl) and an -OH combined. The H in -COOH is the acidic hydrogen that can be donated as H⁺ in solution.
Practice questions for Carboxylic Acids
What is the functional group present in all carboxylic acids?
Explain why carboxylic acids are described as weak acids.