Question

write a net ionic equation for the reaction that occurs when solid magnesium carbonate is combined with excess aqueous hydrochloric acid. be sure to specify states such as (aq) or (s). if a box is not needed leave it blank. show approach show tutor steps

Explanation:

Step1: Write the molecular equation

The reaction between solid magnesium carbonate ($MgCO_3$(s)) and aqueous hydrochloric acid ($HCl$(aq)) is: $MgCO_3(s)+2HCl(aq)
ightarrow MgCl_2(aq)+H_2O(l)+CO_2(g)$.

Step2: Write the complete ionic equation

Break the soluble ionic compounds into ions. $MgCO_3(s)$ is a solid and does not dissociate. $HCl(aq)$ dissociates into $H^+(aq)$ and $Cl^-(aq)$, $MgCl_2(aq)$ dissociates into $Mg^{2 +}(aq)$ and $2Cl^-(aq)$. So the complete - ionic equation is: $MgCO_3(s)+2H^+(aq)+2Cl^-(aq)
ightarrow Mg^{2 +}(aq)+2Cl^-(aq)+H_2O(l)+CO_2(g)$.

Step3: Write the net - ionic equation

Cancel out the spectator ions (ions that appear on both sides of the equation). Here, $2Cl^-(aq)$ is the spectator ion. The net - ionic equation is: $MgCO_3(s)+2H^+(aq)
ightarrow Mg^{2 +}(aq)+H_2O(l)+CO_2(g)$.

Answer:

$MgCO_3(s)+2H^+(aq)
ightarrow Mg^{2 +}(aq)+H_2O(l)+CO_2(g)$