Question

which off the following are Lewis acid
H2O, BF3 , H+1 , NH4 +1

Answer 1

, nh4 +................

Answer 2

Hey


Among all the above ,


BF3 is the Lewis base .


It doesn't follow the concept of Arrehenius and Bronsted-Lowry for acid , as it doesn't contains hydrogen ions .


So ,

It is a Lewis acid .

And we can say , it is the exception of Arrehenius acid and bronsted - Lowry acid .


Talk about rest :-

# H2O :- It is bronsted - Lowry acid as well as base .

As , it donates H+ ions and receives H+ ions too .


# NH4 :- It is bronsted Lowry base .

As it receives H+ ions .

By the way , NH4 is also an ampotheric compound .


# H+1 :- It also follow bronsted Lowry concept .


thanks :)