Question Constellation Sign up for free AQA · GCSE · Chemistry · Higher
Defining a weak acid
Acids can be either weak or strong.
What is meant by ‘a weak acid’?
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Marking points
- 1 States that a weak acid is only partially ionised/dissociated.
- 2 States that this is in aqueous solution or when dissolved in water.
Full-mark answer
A weak acid is only partially ionised in aqueous solution.
Why this answer loses marks
A weak acid is a dilute acid.
Strength is the degree of ionisation in water, not the amount of acid in the solution.