As you have it written NH3 donates a proton to the solution and this hydrogen ion is picked up by PH3 to make PH4; so NH3 is the acid here. ( though this reaction seems odd to me )
This is an double-displacement reaction, in this case and acid-base reaction.
Mg + KCl
81.93%
A double replacement reaction.
Water
The products of neutralization reaction are water and a salt.
In this reaction, H3O+ is behaving as an acid. It is donating a proton to water (H2O) to form the hydronium ion (H3O+) and the conjugate base of phosphoric acid (H2PO4-).
The products of neutralization reaction are water and a salt.
The reaction between sulfuric acid (H2SO4) and sulfur trioxide (SO3) to form sulfuric acid (H2SO4) is a reversible reaction known as the sulfuric acid hydration reaction. The water (H2O) acts as a reactant in this reaction to hydrate the sulfur trioxide, forming additional sulfuric acid.
The reaction between ammonia (NH3) and water (H2O) to form ammonium hydroxide (NH4OH) is an acid-base reaction. Ammonia acts as a base, accepting a proton (H+) from water to form the ammonium ion (NH4+) and hydroxide ion (OH-).
This is an double-displacement reaction, in this case and acid-base reaction.
An acid plus a base will yield a salt and water in a neutralization reaction.
The reaction you've written is an acid-base reaction where the H+ ion from the acid (HCl) reacts with the NH3 base to form NH4+ ion.
The reaction between ammonium chloride (NH4Cl) and sodium hydroxide (NaOH) forms ammonia gas (NH3), water (H2O), and sodium chloride (NaCl) salt. This reaction is an acid-base reaction where NH4Cl acts as an acid and NaOH acts as a base, resulting in the formation of products.
This chemical reaction represents a neutralization reaction, where an acid (H2SO4) reacts with a base (KOH) to form a salt (K2SO4) and water (H2O).
Neutralization and double displacement
Acid base reaction