Question

Which equation represents a neutralization reaction?

1. Na2CO3 + CaCl2 -> 2NaCl + CaCO3
2. NaCl +AgNO3 -> NaNO3 + AgCl
3. Ni(NO3)2 + H2S -> NiS + 2HNO3
4. H2SO4 + Mg(OH)2 -> MgSO4 + 2H2O

Answer 1

H2SO4(aq) + Mg(OH)2(aq) -> MgSO4(aq) + 2H2O(l)

Step-by-step explanation:

A neutralization reaction is a chemical reaction in which the acid, (aqeous H2SO4) reacts completely with an appropriate amount of base, (aqueous Mg(OH)2) to produce salt, (aqueous MgSO4) and water, (liquid 2H2O) only.

H2SO4(aq) + Mg(OH)2(aq) -> MgSO4(aq) + 2H2O(l)

Acid + base → Salt + Water.

During this reaction, the hydrogen ion, H+, from the H2SO4 is neutralized by the hydroxide ion, OH-, from the Mg(OH)2 to form the water molecule, H2O.

Thus, the formation of salt, MgSO4(aq) and water, 2H2O(l) makes it a neutralization reaction.