Theories

Question 1

What are the three theories?

Answer 1

1. Arrhenius
2. Brosted-Lowry
3. Lewis theory

Question 2

Explain Arrhenius theory

Answer 2

Acid: sub dissociates to give H+ ions when dissolved in water

Base: sub dissociate to give OH- when dissolved in water

Question 3

2 limitations of Arrhenius theory

Answer 3

Cannot account for:

1. Acid-base rn occurring in other solvents
2. Acid-base rn in gaseous state

Question 4

Explain Bronsted-Lowry theory

Answer 4

Acid: H+ donor
Base: H+ acceptor

Question 5

Explain Lewis acid theory

Answer 5

Acid=e- pair acceptor

Base= e- pair donor