Question

Which of the following is a salt that could be generated by combining a weak acid and a weak base? Select the correct answer below:

a) NaCl
b) Na2SO4
c) NH4NO3
d) NH4F

Answer 1

d) NH4F

Step-by-step explanation:

Hello,

In this case, the base resulting from mixing a weak acid and a weak base is d) NH4F since ammonium hydroxide is a wear base and hydrofluoric acid is a weak acid.

Ammonium hydroxide is a weak base since it is not completely ionized in ammonium and hydroxyl ions:

`NH_4OH\rightarrow NH_4^++OH^-`

Moreover, hydrofluoric acid is a weak acid since it is not completely ionized in hydrogen and fluoride ions:

`HF\rightleftharpoons H^++F^-`

For the both of the substances, the limit is established by the basic and the acid dissociation constant respectively.

Regards.