Acid-Base Theories and Limitations

The video tutorial covers various acid-base models in the HSC chemistry syllabus, including the oxygen, hydrogen, Arrhenius, and Bronsted-Lowry theories. It explains the development and limitations of each theory, highlighting how the Bronsted-Lowry theory overcomes some of the limitations of the Arrhenius model. The video also discusses the role of water in acid-base reactions and introduces the concept of conjugate pairs.

Which of the following theories was the first to propose a model for bases?

• Bronsted-Lowry Theory

• Arrhenius Theory

• Hydrogen Theory

• Oxygen Theory

Who developed the oxygen theory of acids?

• Johannes Bronsted

• Humphrey Davy

• Antoine Lavoisier

• Svante Arrhenius

What was a major limitation of the oxygen theory?

• It could not explain the acidity of HCl.

• It did not account for bases.

• It only applied to gaseous reactions.

• It was not applicable to non-metal compounds.

What did Humphrey Davy demonstrate about hydrochloric acid?

• It is a base.

• It does not contain oxygen.

• It contains oxygen.

• It is amphiprotic.

What is a limitation of the hydrogen theory?

• It does not explain why some hydrogen-containing compounds are not acidic.

• It does not account for the role of oxygen.

• It cannot explain the formation of hydroxide ions.

• It only applies to aqueous solutions.

According to the Arrhenius theory, what do acids produce in water?

• Hydroxide ions

• Hydrogen ions

• Ammonium ions

• Chloride ions

What is a limitation of the Arrhenius theory?

• It does not explain the role of water.

• It only applies to gaseous reactions.

• It does not account for proton donors.

• It cannot explain non-aqueous acid-base reactions.

In the Bronsted-Lowry theory, what is a base defined as?

• A proton donor

• A hydroxide ion producer

• A proton acceptor

• An oxygen donor

What is an amphiprotic substance?

• A substance that is neither acidic nor basic

• A substance that only accepts protons

• A substance that only donates protons

• A substance that can act as both an acid and a base

What is a limitation of the Bronsted-Lowry theory?

• It cannot explain the formation of water.

• It does not explain the acidity of acidic oxides.

• It does not account for conjugate pairs.

• It only applies to aqueous solutions.