Lewis Acids and Bases

Question 1

Who accepts the lone pair?

Answer 1

A Lewis acid

Question 2

Who donates a lone pair?

Answer 2

A Lewis base

Question 3

All Lewis acid-base reactions form what?

Answer 3

They form a coordinate bond since both electrons must come from the base.

Question 4

What is a Nucleophile?

Answer 4

A Nucleophile is an electron-rich species that donates a lone pair to form a covalent bond in a reaction (it is a Lewis base).

Question 5

What is an Electrophile?

Answer 5

An Electrophile is an electron-deficient species that accepts a lone pair from the other reactant to form a new covalent bond (is a Lewis acid).

Question 6

What is the difference between Bronsted - Lowry’s and Lewis’s theories?

Answer 6

Bronsted - Lowry:
- acid = pronton donor
- base = proton acceptor

Lewis:
- acid = electron pair acceptor
- base = electron pair donator

Question 7

Reminder: Lewis reactions can specifically do what?

Answer 7

They can still form salt ,acids and bases without exchanging a H+ proton.