Question

write a net ionic equation for the reaction that occurs when excess hydrochloric acid (aq) and calcium carbonate(s) are combined. (be sure to specify states such as (aq) or (s). if a box is not needed leave it blank. if no reaction occurs leave all boxes blank and click on \submit\.) 3 item attempts remaining. use the references to access important values if needed for this question.

Explanation:

Step1: Write the balanced molecular equation

$CaCO_3(s)+2HCl(aq)
ightarrow CaCl_2(aq)+H_2O(l)+CO_2(g)$

Step2: Write the complete ionic equation

$CaCO_3(s)+2H^+(aq) + 2Cl^-(aq)
ightarrow Ca^{2 +}(aq)+2Cl^-(aq)+H_2O(l)+CO_2(g)$

Step3: Cancel out the spectator ions

The spectator - ion is $Cl^-$. After canceling it out, we get the net ionic equation.
$CaCO_3(s)+2H^+(aq)
ightarrow Ca^{2 +}(aq)+H_2O(l)+CO_2(g)$

Answer:

$CaCO_3(s)+2H^+(aq)
ightarrow Ca^{2 +}(aq)+H_2O(l)+CO_2(g)$