26.3 - Carboxylic Acids Flashcards Preview

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Flashcards in 26.3 - Carboxylic Acids Deck (13):
1

What is a carboxyl group?

COOH (carbonyl + hydroxyl group)

2

Which carbon is always carbon-1 in a carboxylic acid?

The carboxyl carbon

3

Why are carboxylic acids soluble?

The C=O and O-H bonds are polar, allowing carboxylic acids to form hydrogen bonds with water molecules

4

Explain the effect of changing the length of the carbon chain on the solubility of the carboxylic acid

The longer the chain, the lower the solubility. This is because the non-polar carbon chain has a greater effect on the overall polarity of the molecule.

5

Are carboxylic acids strong or weak acids?

Weak acids (only partially dissociate)

6

What reactions can carboxylic acids undergo?

Redox reactions with metals

Neutralisation reactions with bases

7

What is produced when a carboxylic acid reacts with a metal in a redox reaction?

Carboxylate salt + hydrogen gas (H2)

8

What would you observe when a carboxylic acid reacts with a metal in a redox reaction?

The metal would disappear
Effervescence

9

What bases do carboxylic acids react with?

Metal oxides
Carbonates
Alkalis

10

Carboxylic acid + metal oxide = ?

Salt + Water

11

Carboxylic acid + alkali = ?

Salt + Water

12

Carboxylic acid + carbonate = ?

Salt + Water + Carbon dioxide

13

How could you distinguish between a carboxylic acid and a phenol?

Phenols wouldn't react in a neutralisation reaction with carbonates because they aren't acidic enough