Final answer:
The reaction between Ca and MgCl₂ is a single replacement reaction where Ca displaces Mg to form CaCl₂ and Mg. The balanced chemical equation for this reaction is already balanced as written.
Step-by-step explanation:
The subject of the question is Chemistry, specifically involving single replacement reactions and balancing chemical equations. In the given example, the reaction is between calcium (Ca) and magnesium chloride (MgCl₂). Calcium is more reactive than magnesium, so it will displace magnesium from its compound. The correct products for this reaction are calcium chloride (CaCl₂) and magnesium (Mg), represented by the chemical equation:
Ca + MgCl₂ → CaCl₂ + Mg
The next step is to balance the equation. The equation is already balanced with one atom of calcium and magnesium on each side and two chlorine atoms on each side.