Water and ammonia react to form the ammonium ion. Which statement about this reaction is the correct one?
- ANeither the ammonia molecule nor the ammonium ion has a dipole moment.
- BThe bond angle changes from $109.5^\circ$ in the ammonia molecule to $107^\circ$ in the ammonium ion.
- CThe reaction is a redox reaction.
- DThe water is acting as an acid.