4.2.6 Strong & Weak Acids

• 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.