Lewis Acids and Bases Practice Problems

Ammonia reacts with BF₃ to form the adduct BF₃-NH₃. Identify the Lewis acid in this reaction.

For the following reaction, determine the Lewis acid and Lewis base from the reactants.

GaF₃ + NH₃ ⇌ H₃NGaF₃

For the reaction of BH₃ and CH₃NH₂, which diagram shows the correct flow of electrons from the Lewis base to the Lewis acid?

Identify the strongest Lewis acid among the following: BCl₃, BF₃, BI₃, BBr₃.

Classify the following molecules and ions as Lewis acids or bases.

i) H₃C⁺

ii) CO

iii) AlCl₃

iv) CH₂=CH₂

Select the compound that will give a more acidic aqueous solution when dissolved in water: Fe(NO₂)₂ or FeBr₃

In the following reaction, identify the Lewis acid and Lewis base among the reactants: 

CoCl₂ (s) + Cl^- (aq) → CoCl₃^- (aq)

In the following reaction, identify the Lewis acid and Lewis base among the reactants: 

HBr (l) + PH₂^- (aq) ⇌ PH₃ + Br^-

Among the reactants in the following reaction, identify the Lewis acid and Lewis base: Ag⁺(aq) + 2 NH₃(aq) → Ag(NH₃)₂⁺(aq)

Determine whether the following is a Lewis acid or a Lewis base

PH₂CH₂

BF₃

AlCl₃

Br^-