Which of the following Lewis acid-base reactions are not Bronsted acid-base reactions ?

Question

a) CH3COOH(aq) + NH3(aq) = CH3COO-(aq) + NH4 +(aq)

b) Cu 2+(aq) + 4NH3(aq) = Cu(NH3)42+(aq)

c) BeF2(aq) + 2F-(aq) = BeF4 2-(aq)

d) BF3(g) + (CH3CH2)2O(l) --> (CH3CH2)2OBF3(l)

Answer 1

D: it's a formation of a complex ion

Answer 2

Neither B, C, nor D are Bronsted-Lowry acid-base reactions. Only A is. Bronsted-Lowry definition involves proton transfer, and only in A are protons being transferred.