Carboxylic acids are weak acids
Acidic, but not completely ionised.
Strong and weak
Hydrochloric acid, HCl, is a mineral acid. Ethanoic acid is a carboxylic acid. Both are acidic in nature.
How do you think their ionisation compares?
What this lesson covers
The idea
Carboxylic acids are acidic in nature but are weak acids, unlike mineral acids such as HCl, which are completely ionised.
Strong and weak
Hydrochloric acid, HCl, is a mineral acid. Ethanoic acid is a carboxylic acid. Both are acidic in nature.
How do you think their ionisation compares?
- HCl is completely ionised, ethanoic acid is not
- Both are completely ionised
- Neither of them ionises at all
Ionised or not?
Press Next step. The pictures show the idea only.
Acidic but weak
Carboxylic acids are acidic, but they are weak acids. A mineral acid like HCl is completely ionised.
Carboxylic acids are acidic in nature but are weak acids, unlike mineral acids such as HCl, which are completely ionised.
Notes
Carboxylic acids are acidic in nature but are weak acids, unlike mineral acids such as HCl, which are completely ionised.
Check yourself
Which of these is completely ionised?
What can be said about carboxylic acids?
HCl is an example of which kind of acid?
What does it mean to say ethanoic acid is a weak acid?
- Ethanoic acid. Ethanoic acid is a carboxylic acid, and carboxylic acids are weak acids, not completely ionised.
- HCl — correct. Yes!
- Acetic acid. Acetic acid is another name for ethanoic acid, a weak acid that is not completely ionised.
- They are completely ionised. Mineral acids like HCl are completely ionised. Carboxylic acids are weak acids.
- They are not acidic at all. Carboxylic acids are characterised by their acidic nature, though they are weak acids.
- They are acidic in nature but weak acids — correct. Yes!
- A mineral acid — correct. Yes!
- A carboxylic acid. Carboxylic acids have the -COOH group. HCl is a mineral acid.
- A weak acid. HCl is completely ionised, so it is not a weak acid.
- It is completely ionised. Complete ionisation is the property of mineral acids like HCl.
- It is not completely ionised, unlike HCl — correct. Yes!
- It has no acidic nature. Ethanoic acid is acidic in nature. It is weak because it is not completely ionised.