Classify the following into acids and bases according to Lewis Concept:
`S^(2-), H^(+),OH^(-),BF_(3),Ni^(2+) ,AICI_(3), NF_(3),SnCI_(4),NH_(3)`

Explanation

Lewis acids :`H^(+), OH^(-),BF_(3)Ni^(2+) ,AICI_(3) ,SnCI_(4)`
Lewis acids :`S^(2-), OH^(-),NF_(3),NH_(3).`