Final answer:
The balanced chemical equation is 2H₃PO₄ + 3CaCl₂ → Ca₃(PO₄)₂ + 6HCl.
Step-by-step explanation:
To balance the chemical equation H₃PO₄ + CaCl₂ → Ca₃(PO₄)₂ + HCl, we need to ensure that the number of atoms of each element is equal on both sides of the equation. The balanced equation is:
2H₃PO₄ + 3CaCl₂ → Ca₃(PO₄)₂ + 6HCl