4.2.6 Strong & Weak Acids

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What is a strong acid?
An acid that is completely ionised in an aqueous solution.
What is a weak acid?
An acid that is only partially ionised in an aqueous solution.
What are three examples of strong acids?
Hydrochloric acid, sulfuric acid and nitric acid.
What are three examples of weak acids?
Ethanoic acid, citric acid and carbonic acid.
For a given concentration of aqueous solutions, the stronger an acid, the ___ the pH?
Lower.
As the pH decreases by one unit, the hydrogen ion concentration of the solution…?
Increases by a factor of 10.
What do acids ionise to form in aqueous solutions?
Hydrogen ions (H+).
Is the ionisation of a strong acid reversible?
No.
Is the ionisation of a weak acid reversible?
Yes.
What is a dilute acid?
An acid that has been mixed with water to reduce its concentration.
What is a concentrated acid?
An acid which is not very watered down.

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