ย 

Neutralisation for AQA A-level Chemistry

Neutralisation

This page covers the following topics:

1. Neutralising carboxylic acids

Carboxylic acids react with some metal oxides and metal hydroxides to produce a salt and water.
CaO + 2CHโ‚ƒCOOH โ†’ (CHโ‚ƒCOO)โ‚‚Ca + Hโ‚‚O
KOH + CHโ‚ƒCOOH โ†’ CHโ‚ƒCOOK + Hโ‚‚O

Carboxylic acids react with metal carbonates to produce a salt, water and carbon dioxide.
MgCOโ‚ƒ + 2CHโ‚ƒCOOH โ†’ (CHโ‚ƒCOO)โ‚‚Mg + Hโ‚‚O + COโ‚‚

Neutralising carboxylic acids

1

Provide a balanced chemical equation for the reaction between butanoic acid and sodium oxide.

Carboxylic acids react with some metal oxides and metal hydroxides to produce a salt and water.

Naโ‚‚O + 2CHโ‚ƒCHโ‚‚CHโ‚‚COOH โ†’ 2CHโ‚ƒCHโ‚‚CHโ‚‚COONa + Hโ‚‚O

Provide a balanced chemical equation for the reaction between butanoic acid and sodium oxide.

2

What is a balanced equation for the reaction of butanoic acid with strontium oxide?

Carboxylic acids react with some metal oxides and metal hydroxides to produce a salt and water.

SrO + 2CHโ‚ƒCHโ‚‚CHโ‚‚COOH โ†’ (CHโ‚ƒCHโ‚‚CHโ‚‚COO)โ‚‚Sr + Hโ‚‚O

What is a balanced equation for the reaction of butanoic acid with strontium oxide?

3

Which hydrogen in a carboxylic acid molecule most commonly participates in a neutralisation reaction?

Carboxylic acids react with some metal oxides and metal hydroxides to produce a salt and water. For example, KOH + CHโ‚ƒCOOH โ†’ CHโ‚ƒCOOK + Hโ‚‚O. Therefore, the hydrogen in the carboxylic group is involved in the reaction.

4

Which hydrogen in a carboxylic acid molecule most commonly participates in a neutralisation reaction?

4

Provide a chemical equation for a reaction between ethanoic acid and sodium carbonate.

Carboxylic acids react with metal carbonates to produce a salt, water and carbon dioxide.

Naโ‚‚COโ‚ƒ + 2CHโ‚ƒCOOH โ†’ 2CHโ‚ƒCOONa + Hโ‚‚O + COโ‚‚

Provide a chemical equation for a reaction between ethanoic acid and sodium carbonate.

5

A carboxylic acid can be neutralised in a few different ways. Explain why such reactions do not always result in the production of carbon dioxide.

Carboxylic acids react with some metal oxides and metal hydroxides to produce a salt and water. Carboxylic acids react with metal carbonates to produce a salt, water and carbon dioxide. When carboxylic acids are neutralised by bases there would be no COโ‚‚ produced, while when they react with metal carbonates carbon dioxide would be produced.

When carboxylic acids react with metal carbonates COโ‚‚ is produced, while when they react with bases - not.

A carboxylic acid can be neutralised in a few different ways. Explain why such reactions do not always result in the production of carbon dioxide.

End of page

ย