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 species that can donate a proton, therefore, it needs a "H" on it, and that hydrogen needs to be capable of "leaving":
For $OH^-$ and $N{H_2}^-$, they have one "H", but the negative charges are making the donation very hard, because the molecule is attracting the proton a lot.
- Bronsted bases are species capable of receiving a proton: they need a lone pair, and a electronegative atom, so the molecule can attract the proton.
