Answer:
Na₂CO₃ + CaCl₂ → CaCO₃ + 2 NaCl
Explanation:
Na₂CO₃ + CaCl₂ → CaCO₃ + NaCl
First, determine what is balanced.
Ca and CO₃ is balanced; there is one on each side.
Na and Cl aren't balanced. On one side, there is two of each, while on the other there is only one. To fix this add a 2 in front of NaCl. This will cause the equation to be balanced.
Na₂CO₃ + CaCl₂ → CaCO₃ + 2 NaCl