Question

Say if each of the following is a Brownsted Lorry acid or base or both i.e. amphoterica) H2O b) OH- c) H3O + d) NH3 e) NH4 + f) NH2 g) NO3- h) CO3 2- i) HBr j) HCN

Answer 1

First, a bit of theory:

Brønsted-Lowry Acids and Bases

Like water, many molecules and ions may either gain or lose a proton under the appropriate conditions. Such species are said to be amphiprotic.

If the molecules or ions gain protons, they are bases.

if they lose protons, we have an acid.

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a) H2O is both, acid and base. Amphoteric

b) OH- is a base, gains.

c) H3O + is an acid, loses.

d) NH3 is a base, gains.

e) NH4 + is an acid, loses.

f) NH2- is a base, gains.

g) NO3- is a base, gains.

h) CO3 2- is a base, gains.

i) HBr is an acid, loses.

j) HCN​ is an acid, loses.