Hi,
For this exercise, this will be on writing
the complete reaction involving two aqueous
substances.
Here is the problem:
Write a balanced (a) molecular, (b) total
ionic, and (c) net ionic equation (if any)
for the following pair of substances. If the
reaction did not occur, write no reaction
in the net ionic equation section.
The substances are potassium chloride + zinc
nitrate.
NOTE: Ions are in aqueous phase or (aq).
The molecular equation is when KCl mixes with
Zn-NO3-2
around in parentheses in which potassium ion
pairs with nitrate ion along with zinc ion
pairs with chloride ion to produce aqueous
Zn-Cl-2 or zinc chloride and K-NO3 or potassium
nitrate. However, the equation is balanced
when a coefficient of 2 is in front of KCl
and a coefficient of 2 infront of KNO3.
The total ionic equation is 2 potassium ions
plus 2 chloride ions plus 1 zinc ion plus
2 nitrate ions 
forming 1 zinc ion
plus 2 chloride ions plus 2 potassium ions
plus 2 nitrate ions. Cross out any similar
species found on both sides of this equation.
In the net ionic equation section, we write
no reaction because all ions were cancelled
in the total ionic equation section.
The spectator ions are all found in the total
ionic equation: potassium ion, zinc ion, chloride
ion, and nitrate ion.
