Identify the Lewis acid and Lewis base from among the reactants in each of the f

Question

Identify the Lewis acid and Lewis base from among the reactants in each of the following equations.

Part A

Ag+(aq)+2NH3(aq)Ag(NH3)2+(aq)

Part B

AlBr3+NH3H3NAlBr3

Part C

Cl(aq)+AlCl3(aq)AlCl4(aq)

Identify the Lewis acid and Lewis base from among the reactants in each of the following equations.

Part A

Ag+(aq)+2NH3(aq)Ag(NH3)2+(aq)

a. Ag+ is the Lewis acid and NH3 is the Lewis base. b. Ag+ is the Lewis base and NH3 is the Lewis acid.

Part B

AlBr3+NH3H3NAlBr3

a. AlBr3 is the Lewis base and NH3 is the Lewis acid. b. AlBr3 is the Lewis acid and NH3 is the Lewis base.

Part C

Cl(aq)+AlCl3(aq)AlCl4(aq)

a. AlCl3 is the Lewis acid and Cl is the Lewis base. b. AlCl3 is the Lewis base and Cl is the Lewis acid.

Explanation / Answer

Lewis acid are electron lone pair acceptor and Lewis bases are electron lone pair donar.

Hence:

Part A

a. Ag+ is the Lewis acid and NH3 is the Lewis base.   [NH3 has lone pair of electrons where as Ag+ has empty orbitals to accept the electron from NH3]

Part B

b. AlBr3 is the Lewis acid and NH3 is the Lewis base. [NH3 has lone pair of electrons where as AlBr3 has empty orbitals to accept the electron from NH3]

Part C

a. AlCl3 is the Lewis acid and Cl is the Lewis base. [Cl- has lone pair of electrons where as AlCl3 has empty orbitals to accept the electron from NH3]

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