Transcript How to Write Net Ionic Equations

How to Write Net Ionic
Equations
Applying Solubility Rules
How to Write Net Ionic
Equations

Solve the problem, showing all steps

Step 1: Predict the products of the double
displacement reaction and ensure that the
equation is balanced.

Na2S + FeSO4 → Na2SO4 + FeS
How to Write Net Ionic
Equations
Step 2: Use “aq” and “s” to identify each
species as being soluble and which will
form precipitates
 This is known as the balanced
molecular equation.
 Na2S (aq) + FeSO4(aq) → Na2SO4(aq) +
FeS(s)

How to Write Net Ionic
Equations
Step 3: Write the ionic equation by
breaking up soluble species into their
ions.
 This is known as the complete ionic
equation, total ionic equation, or ionic
equation.


2Na+(aq) + S2-(aq) + Fe2+(aq) + SO42-(aq)
→ 2Na+(aq) + SO42-(aq) + FeS(s)
How to Write Net Ionic
Equations

Step 4: Cancel out all spectator ions
(ions that do not combine to form the
precipitate) and rewrite the equation.

2Na+(aq) + S2-(aq) + Fe2+(aq) +
SO4(aq)→ 2Na+(aq) + SO42-(aq) + FeS(s)
How to Write Net Ionic
Equations

This gives the net ionic equation (an
equation that only has the ions that
recombine to form the precipiate, as well
as the precipitate product).
 S2-(aq)
+ Fe2+(aq) → FeS(s)
How to Write Net Ionic
Equations

Solve the problem, showing all steps

BaCl2 + Na3PO4 →
How to Write Net Ionic
Equations

Step 1: Predict the products of the double
displacement reaction and ensure that the
equation is balanced.
How to Write Net Ionic
Equations

Step 2: Use “aq” and “s” to identify each
species as being soluble and which will
form precipitates
How to Write Net Ionic
Equations

Step 3: Write the ionic equation by
breaking up soluble species into their
ions.
How to Write Net Ionic
Equations

Step 4: Cancel out all spectator ions and
rewrite the equation.
How to Write Net Ionic
Equations

This gives the net ionic equation.