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Multiple Choice
Identify the Lewis acids and bases in the following reactions. a) H+ + OH– ⇌ H2O b) Cl– + BCl3 ⇋ BCl4– c) SO3 + H2O ⇌ H2SO4
A
a) H+:acid, OH-:base; b) Cl-:acid, BCl3:base; c)SO3:acid, H2O:base
B
a) H+:base, OH-:acid; b) Cl-:acid, BCl3:base; c)SO3:base, H2O:acid
C
a) H+:acid, OH-:base; b) Cl-:base, BCl3:acid; c)SO3:acid, H2O:base
D
a) H+:acid, OH-:base; b) Cl-:base, BCl3:acid; c)SO3:base, H2O:acid
Verified step by step guidance
1
Step 1: Understand the concept of Lewis acids and bases. A Lewis acid is a substance that can accept a pair of electrons, while a Lewis base is a substance that can donate a pair of electrons.
Step 2: Analyze reaction (a) H+ + OH– ⇌ H2O. Here, H+ is a proton that can accept a pair of electrons from OH–, making H+ the Lewis acid and OH– the Lewis base.
Step 3: Analyze reaction (b) Cl– + BCl3 ⇋ BCl4–. In this reaction, BCl3 has an empty orbital and can accept a pair of electrons from Cl–, making BCl3 the Lewis acid and Cl– the Lewis base.
Step 4: Analyze reaction (c) SO3 + H2O ⇌ H2SO4. SO3 can accept a pair of electrons from H2O to form H2SO4, making SO3 the Lewis acid and H2O the Lewis base.
Step 5: Review the correct identifications: a) H+ is the acid, OH– is the base; b) Cl– is the base, BCl3 is the acid; c) SO3 is the acid, H2O is the base.