Question

Which of the following statements involving ammonia is false ? at the equivalence point of a titration of aqueous NH3 with aqueous HCl, the pH should be > 7

ammonia can act as a Brønsted-Lowry base or a Lewis base

ammonia is a stronger base than H2O, but ammonia is a weaker base than OH−

store-bought aqueous NH3 has a pungent smell because NH3 does not completely hydrolyze water

the following reaction is a Lewis acid-base reaction : Ag+(aq) + 2NH3(aq) ↔ Ag(NH3)2+(aq)\

Answer 1

Solution :-

at the equivalence point of a titration of aqueous NH3 with aqueous HCl, the pH should be > 7 = false.

This is flaase statement because at the equivalence point all NH3 changes to NH4+ which is acidic in nature so the pH is below the 7

ammonia can act as a Brønsted-Lowry base or a Lewis base = True

because as per the Bronsted thery it accepts proton and according to lewis theory it donates electron pair.

ammonia is a stronger base than H2O, but ammonia is a weaker base than OH− = True .

store-bought aqueous NH3 has a pungent smell because NH3 does not completely hydrolyze water = True

the following reaction is a Lewis acid-base reaction : Ag+(aq) + 2NH3(aq) ↔ Ag(NH3)2+(aq) = True