Answer
(a) Both
(b) Base
(c) Acid
(d) Both
(e) Acid
(f) Base
(g) Base
(h) Base
(i) Acid
(j) Acid
Work Step by Step
Bronsted acids are compounds capable of donating a proton. Therefore, they need a (H), and that hydrogen needs to be capable of leaving the molecule.
- The $OH^-$ and the $NH_2^-$ have hydrogens, but, they cannot donate them.
Brosted bases are compounds capable of receiving a proton. Therefore, they need a lone pair for receiving this proton.
- The $H_3O^+$, $HBr$ and $HCN$ have lone pairs, but they don't, normally, receive a proton.
