# Net Ionic Equations.

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Net Ionic Equations

Aqueous solutions of Sodium Hydroxide and Copper (II) Chloride combine to form an aqueous solution of sodium chloride and solid blue Copper Hydroxide Write a skeleton equation Balance the equation. Identify the spectator ions. Write the total ionic equation. Write the net ionic equation.

Aqueous solutions of Sodium Hydroxide and Copper (II) Chloride combine to form an aqueous solution of sodium chloride and solid blue Copper Hydroxide

Na(OH)(aq) + CuCl2(aq) Cl -1 Cu+2 Na+1 OH -1 Cl -1

Na(OH)(aq) + CuCl2(aq)  NaCl(aq) + Cu(OH)2 (s)
The Copper and Hydroxide Join to form solid Copper Hydroxide Cl -1 Na+1 Cu+2 OH -1 Precipitate OH -1 Cl -1 Equation Not Balanced

Na(OH)(aq) + CuCl2(aq)  NaCl(aq) + Cu(OH)2 (s)
Balance the skeleton Equation Na O H Cu Cl

Na(OH)(aq) + CuCl2(aq)  NaCl(aq) + Cu(OH)2 (s)
Balance the skeleton Equation Na O H Cu Cl 1 2

2Na(OH)(aq) + CuCl2(aq)  NaCl(aq) + Cu(OH)2 (s)
Balance the skeleton Equation Na O H Cu Cl 1 2

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
Balanced Molecular Formula Na O H Cu Cl 1 2

Spectator Ions? They don’t take part in the reaction.
Cl -1 Na+1 Cl -1 Na+1 OH -1 OH -1 Cu+2 Cu+2 Cl -1 Na+1 OH -1 Na+1 Cl -1 OH -1 Na+1 Cl -1 Cl -1 Na+1 Na+1 Na+1 OH -1 OH -1 Cu+2 Cu+2 OH -1 Cl -1 Cl -1 OH -1

WRITING TOTAL AND NET IONIC EQUATIONS
Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) TOTAL IONIC EQUATION Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) Net IONIC EQUATION? Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions.

2Na(OH)(aq) + CuCl2(aq)  2NaCl(aq) + Cu(OH)2 (s)
2Na1+(aq) + 2(OH)1-(aq) + Cu2+(aq) + 2Cl1-(aq)  2Na1+(aq) + 2Cl1-(aq) + Cu(OH)2(s) 2(OH)1-(aq) + Cu2+(aq)  Cu(OH)2(s) Balanced molecular equation. Disassociate the aqueous ionic compounds (strong electrolytes) indicating the correct formula, number and charge of each. Bring down all compounds with (s), (l), or (g) unchanged. This is a total Ionic Equation. For a net ionic equation cross out the spectator ions. Net IONIC EQUATION

ANOTHER EXAMPLE

BaCl2(aq)

BaCl2(aq) + Na2(SO4) 

BaCl2(aq) + Na2(SO4)  2NaCl(aq)

BaCl2(aq) + Na2(SO4)  2NaCl(aq) + BaSO4(s)

BaCl2(aq) + Na2(SO4)(aq)  2NaCl(aq) + BaSO4(s)
BALANCED MOLECULAR FORMULA Balanced molecular equation. Show the disassociated ions individually. Bring down all compounds with (s), (l), or (g) unchanged. Cross out the spectator ions.

BaCl2(aq) + Na2(SO4)(aq)  2NaCl(aq) + BaSO4(s)
BALANCED MOLECULAR FORMULA Ba2+(aq) + 2Cl1-(aq) + 2Na1+(aq) + SO42-(aq)  2Na1+(aq) + 2Cl1-(aq) + BaSO4(s) TOTAL IONIC EQUATION Balanced molecular equation. Show the disassociated ions individually. Bring down all compounds with (s), (l), or (g) unchanged. Cross out the spectator ions.

BaCl2(aq) + Na2(SO4)(aq)  2NaCl(aq) + BaSO4(s)
BALANCED MOLECULAR FORMULA Ba2+(aq) + 2Cl1-(aq) + 2Na1+(aq) + SO42-(aq)  2Na1+(aq) + 2Cl1-(aq) + BaSO4(s) TOTAL IONIC EQUATION Ba2+(aq) + 2Cl1-(aq) + 2Na1+(aq) + SO42-(aq) 2Na1+(aq) + 2Cl1-(aq) + BaSO4(s) CROSS OUT SPECTATOR IONS Balanced molecular equation. Show the disassociated ions individually. Bring down all compounds with (s), (l), or (g) unchanged. Cross out the spectator ions.

BaCl2(aq) + Na2(SO4)(aq)  2NaCl(aq) + BaSO4(s)
BALANCED MOLECULAR FORMULA Ba2+(aq) + 2Cl1-(aq) + 2Na1+(aq) + SO42-(aq)  2Na1+(aq) + 2Cl1-(aq) + BaSO4(s) TOTAL IONIC EQUATION Ba2+(aq) + 2Cl1-(aq) + 2Na1+(aq) + SO42-(aq) 2Na1+(aq) + 2Cl1-(aq) + BaSO4(s) CROSS OUT SPECTATOR IONS Ba2+(aq) + SO42-(aq) BaSO4(s) NET IONIC EQUATION Balanced molecular equation. Show the disassociated ions individually. Bring down all compounds with (s), (l), or (g) unchanged. Cross out the spectator ions.

An aqueous solution of aluminum chloride and sodium hydroxide react to form solid aluminum hydroxide. Write a skeleton equation Balance the equation (molecular formula) Write the total ionic equation. Identify the spectator ions. Write the net ionic equation. Neutralization Acid—Base reaction…. HBr (aq) + NaOH(aq)  H2O + NaBr Assignment