Input interpretation
NaPO4 + CaCl2 → Ca(PO4)2 + NaCl
Calcium chloride sodium chloride
Balanced equation
Balance the chemical equation algebraically:
NaPO4 + CaCl2 → Ca(PO4)2 + NaCl
Add stoichiometric coefficients, c, to the reactants and products:
c1NaPO4 + c2CaCl2 → c3Ca(PO4)2 + c4NaCl
Set the number of atoms in the reactants equal to the number of atoms in the products for Na, P, O, Ca and Cl:
Na: c1 = c4
P: c1 = 2c3
O: 4c1 = 8c3
Ca: c2 = c3
Cl: 2c2 = c4
Since the coefficients are relative quantities and underdetermined, choose a coefficient to set arbitrarily. To keep the coefficients small, the arbitrary value is ordinarily one. For instance, set c2 = 1 and solve the system of equations for the remaining coefficients:
c1 = 2
c2 = 1
c3 = 1
c4 = 2
Substitute the coefficients into the chemical reaction to obtain the balanced
equation:
Answer:
NaPO4 + CaCl2 → Ca(PO4)2 + NaCl
