4.2.5 Strong and weak acids

• What does it mean for an acid to be described as strong?

  Completely dissociates in water
• Strong acids have a higher degree of ionization compared to weak acids.

  True
• Acetic acid is an example of a weak acid.


  True
• The pH range of strong acids is typically 1-3
• Weak acids only partially dissociate
• Strong acids typically have a pH range of 1-3
• What implications does the difference between strong and weak acids have in chemical reactions?

  Affects reaction rates
• Weak acids only partially dissociate in water.


  True
• The pH range of weak acids is typically 3-6
• The degree of dissociation in strong acids is complete
• What is the key difference between strong and weak acids in terms of their effect on pH?

  High vs. low H⁺ concentration
• What is the key difference between strong and weak acids?

  Degree of dissociation
• What is the typical pH range of strong acids?

  1-3
• Name three common examples of strong acids.

  HCl, H₂SO₄, HNO₃
• Strong acids release a higher concentration of H⁺ ions than weak acids.


  True
• Strong acids undergo complete dissociation in water.
• What is the pH range of strong acids such as hydrochloric acid (HCl)?

  1-3
• How many H⁺ ions does a molecule of H₂SO₄ release when fully dissociated?

  2
• Weak acids have a higher pH than strong acids because they release fewer H⁺ ions.

  True
• Match the weak acid with its chemical formula:

  Acetic acid ↔️ CH₃COOH

  Carbonic acid ↔️ H₂CO₃

  Nitrous acid ↔️ HNO₂
• Weak acids have a lower concentration of H⁺ ions and a higher pH
• How do strong acids differ from weak acids based on their ionization in water?

  Complete vs. partial dissociation
• Give an example of a strong acid.

  Hydrochloric acid (HCl)
• Match the property of strong acids with its description:

  Degree of Dissociation ↔️ Complete dissociation

  Ions Produced ↔️ H⁺ and anions

  Common Examples ↔️ HCl, H₂SO₄, HNO₃
• What ions are produced when weak acids dissociate in water?

  H⁺ and anions
• Why do weak acids have a higher pH compared to strong acids?

  Partial dissociation
• What ions are produced when strong acids dissociate in water?

  H⁺ and anions
• Strong acids undergo complete dissociation in water, while weak acids only undergo partial dissociation.

  True
• Strong acids undergo complete dissociation in water.
• Weak acids have a higher pH range because they release a lower concentration of H⁺ ions.
• Why do weak acids have a higher pH compared to strong acids?

  Lower H⁺ concentration
• What is the typical pH level of weak acids?

  3-6
• Which type of acid has a pH range of 1-3?

  Strong acid
• Strong acids are defined by their complete dissociation in water.
• Nitric acid completely breaks down into H⁺ and NO₃⁻
• Acetic acid, found in vinegar, only partially ionizes
• Strong acids break down into hydrogen ions and anions when dissolved in water.

  True
• The pH range of weak acids is typically between 3 and 6.


  True
• Match the strong acid with its example:

  Hydrochloric acid ↔️ HCl

  Sulfuric acid ↔️ H₂SO₄

  Nitric acid ↔️ HNO₃
• What is the degree of ionization in strong acids?

  Complete ionization