Net Ionic Equations

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Reactant species in a chemical reaction may be spectators and not actually participate in the breaking and forming of chemical bonds.
Model 1 shows three reactions with different species in each reaction.
Beakers 1C, 2A, 3A, 2C, and 3C contain solid, insoluble substances.
- Evidence: The particles are clumped together into a solid in the beaker.

Beakers IA, 1B, 1C, 2B, and 2C contain solutions of ionic substances.
Evidence: The particles are evenly distributed in the mixture, indicating ionic compounds.
Reaction 3 in Model 1 produces a gas.
Three reactions are provided and need to be matched with the reactions in Model 1.
Reaction 1: Zn (s) + 2HCI (aq) ZnCl2 (aq) + H2 (g)
Reaction 2: Zn (s) + Cu(NO) (aq) Zn(NO)2 (aq) + Cu(s)
Reaction 3: Zn n(NO3)2 (aq) + Na2CO3(aq) ZnCO(s) + 2NaNO (aq)
Descriptions of the chemical changes in each reaction are provided.

Model 2 shows three ways to write a reaction: molecular equation, ionic equation, and net ionic equation.
The ionic equation represents the ionic substances as separate ions in solution.
The net ionic equation is a better representation of how the species take part in the reaction.
The net ionic equation is compared to the other two equations.
The net ionic equation is missing the spectator ion NO3-.
It is valid to remove this species from the equation because it does not change chemically.

Ionic and net ionic equations are written for the remaining reactions in Model 1.
Instructions are given for writing ionic and net ionic equations.
Examples of equations for the reactions are provided.