Why is ethanoic acid considered a weak acid?
Answer and explanation
Correct answer: Because it ionises only partially in water
Acid strength depends mainly on the extent to which an acid ionises in water, not simply on whether it dissolves. Ethanoic acid establishes an equilibrium and releases only a fraction of its molecules as hydrogen ions and ethanoate ions: CH3COOH ⇌ H+ + CH3COO−. Thus it is a weak acid. Option A is correct; it does dissolve, is not a metal, and definitely contains carbon.
Frequently asked questions
What is the correct answer to this question?
Because it ionises only partially in water
Why is this the correct answer?
Acid strength depends mainly on the extent to which an acid ionises in water, not simply on whether it dissolves. Ethanoic acid establishes an equilibrium and releases only a fraction of its molecules as hydrogen ions and ethanoate ions: CH3COOH ⇌ H+ + CH3COO−. Thus it is a weak acid. Option A is correct; it does dissolve, is not a metal, and definitely contains carbon.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Carbon and its Compounds.
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