Question

Write a balanced molecular and net ionic equation for:

Mg(NO₃)₂ (aq) + Na₂CO₃ (s)
Options:
A. Mg(NO₃)₂ (aq) + Na₂CO₃ (s) → MgCO₃ (s) + 2NaNO₃ (aq)
B. MgCO₃ (s) + 2NaNO₃ (aq) → Mg(NO₃)₂ (aq) + Na₂CO₃ (s)
C. Mg(NO₃)₂ (aq) + Na₂CO₃ (s) → MgCO₃ (s) + NaNO₃ (aq)
D. MgCO₃ (s) + NaNO₃ (aq) → Mg(NO₃)₂ (aq) + Na₂CO₃ (s)

Answer 1

The balanced molecular equation for the reaction between Mg(NO3)2 (aq) and Na2CO3 (s) is A: Mg(NO3)2 (aq) + Na2CO3 (s) → MgCO3 (s) + 2NaNO3 (aq). The net ionic equation is Mg2+ (aq) + CO32- (s) → MgCO3 (s).

Step-by-step explanation:

The reaction between Mg(NO3)2 (aq) and Na2CO3 (s) is a double displacement reaction where magnesium carbonate forms as a precipitate and sodium nitrate remains in aqueous solution. The correct balanced molecular equation for this reaction is:

Mg(NO3)2 (aq) + Na2CO3 (s) → MgCO3 (s) + 2NaNO3 (aq)

This corresponds to option A.

The net ionic equation narrows down the reaction to the formation of magnesium carbonate:

Mg2+ (aq) + CO32- (s) → MgCO3 (s)