Acid-Base Theories and Reactions

The video tutorial explains the definitions of acids and bases according to Arrhenius and Bronsted-Lowry. Arrhenius defines acids and bases in terms of their behavior in aqueous solutions, where acids increase hydronium ions and bases increase hydroxide ions. Bronsted-Lowry offers a broader definition, where acids donate protons and bases accept them, applicable to gases and solids as well. The video also covers reversible reactions and the concept of conjugate acid-base pairs, highlighting the broader applicability of Bronsted-Lowry's theory compared to Arrhenius.

Which two scientists are known for their definitions of acids and bases?

• Newton and Einstein

• Arrhenius and Brønsted-Lowry

• Curie and Rutherford

• Bohr and Planck

According to Arrhenius, what do acids do in aqueous solutions?

• Decrease the concentration of hydrogen ions

• Decrease the concentration of hydroxide ions

• Increase the concentration of hydronium ions

• Increase the concentration of sodium ions

What is produced when HCl is dissolved in water according to Arrhenius?

• H2 and Cl2

• H3O+ and Cl-

• H2O and NaCl

• Na+ and OH-

In the reaction of NaOH in water, what ion is increased?

• Hydronium ion

• Chloride ion

• Hydroxide ion

• Sodium ion

According to Brønsted-Lowry, what is an acid?

• A substance that accepts an electron

• A substance that donates an electron

• A substance that accepts a proton

• A substance that donates a proton

In the Brønsted-Lowry example, what does NH3 become when it gains a proton?

• NH3+

• NH2+

• NH4+

• NH2-

What is the role of H2O in the reaction with NH3 according to Brønsted-Lowry?

• It acts as a solvent

• It acts as a catalyst

• It acts as an acid

• It acts as a base

What is a conjugate acid in a reversible reaction?

• The substance that gains an electron

• The substance that donates a proton

• The substance that accepts a proton

• The substance that loses a proton in the reverse reaction

Why are Brønsted-Lowry definitions considered broader than Arrhenius?

• They apply only to gases

• They only consider electron transfer

• They apply to all states of matter

• They are limited to aqueous solutions

Which statement is true about Arrhenius and Brønsted-Lowry acids?

• They only apply to solid acids

• All Arrhenius acids are Brønsted-Lowry acids

• All Brønsted-Lowry acids are Arrhenius acids

• They are completely unrelated