Question

8. Which statement about the ammonia molecule and/or the ammonium ion is correct?
(A) Ammonia molecules are basic because they can donate H+ ions.
(B) If ammonium ions are heated with NaOH(aq), ammonia molecules are formed.
(C) Ammonium ions are basic because they can accept H+ ions.
(D) The bond angle in NH4+ is 2.5° less than the bond angle in NH3

Answer 1

Answer:

A

Explanation:

Ammonia molecules are basic because they have lone pair of electrons

Answer 2

Correct statement regarding ammonium ion and ammonia molecule is -

(B) If ammonium ions are heated with NaOH(aq), ammonia molecules are formed.

(C) Ammonium ions are basic because they can accept H+ ions.

Ammonia molecule is an amphoteric molecule with NH3 chemical formula. Its ionic form is ammonium ion with molecular formula NH4+.

The basic nature of any molecule will be characterized by it's property to accept hydrogen ions or donate hydroxyl ions.

Heating ammonium ions with sodium hydroxide gives reaction -

NaOH + NH4+ -->

Na+ + NH3 + H2O

Difference in bond angle of ammonia and ammonium ions occurs due to presence of lone pair of electrons. Bond angle in ammonia molecule is 107 while in ammonium ion is 109.5.