write the net ionic equation of the reaction between MgCl2 and Na2CO3

First, let's write the complete balanced equation of the reaction between MgCl2 and Na2CO3:

MgCl2 + Na2CO3 -> MgCO3 + 2NaCl

Now, let's write the total ionic equation by splitting the compounds into their respective ions:

Mg^2+ + 2Cl- + 2Na^+ + CO3^2- -> MgCO3 + 2Na^+ + 2Cl-

Finally, let's write the net ionic equation by removing the spectator ions (ions that are present on both sides of the equation):

Mg^2+ + CO3^2- -> MgCO3

Therefore, the net ionic equation for the reaction between MgCl2 and Na2CO3 is:

Mg^2+ + CO3^2- -> MgCO3