Complete and balance the equation for the single displacement reaction between sodium and zinc chloride. Phases are optional. balanced equation:
Na(s) + ZnCl_{2}(aq) ->
Na(s)+ZnCl2(aq)⟶

2Na + ZnCl₂   →       2NaCl + Zn

Explanation:

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Chemical equation:

Na + ZnCl₂   →       NaCl + Zn

Balance chemical equation:

2Na + ZnCl₂   →       2NaCl + Zn

Step 1:

Na + ZnCl₂   →       NaCl + Zn

Left hand side                 Right hand side

Na = 1                                 Na = 1

Zn = 1                                  Zn = 1

Cl = 2                                 Cl = 1

Step 2:

Na + ZnCl₂   →       2NaCl + Zn

Left hand side                 Right hand side

Na = 1                                 Na = 2

Zn = 1                                  Zn = 1

Cl = 2                                 Cl =  2

Step 3:

2Na + ZnCl₂   →       2NaCl + Zn

Left hand side                 Right hand side

Na = 2                                 Na = 2

Zn = 1                                  Zn = 1

Cl = 2                                 Cl =  2