4.2 Net Ionic Equations (AP Chemistry)

Front

What is a net ionic equation?

Back

A net ionic equation is a chemical equation that shows only the species that participate in a reaction, omitting the spectator ions.

Front

What are spectator ions?

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged in the solution.

Front

How do you write a net ionic equation?

Back

1. Write the balanced molecular equation. 2. Separate the soluble strong electrolytes into their ions. 3. Remove the spectator ions. 4. Write the remaining ions as the net ionic equation.

Front

What is the significance of precipitation reactions?

Back

Precipitation reactions are significant because they can indicate the formation of an insoluble product, which can be used to separate substances in a mixture.

Front

What is the solubility rule for halides?

Back

Most halides (Cl-, Br-, I-) are soluble in water, except those of Ag+, Pb2+, and Hg2^2+.

Front

What is the result of mixing AgNO3 and NaCl?

Back

The result is the formation of a precipitate of AgCl, which is insoluble in water.

Front

What is the role of ammonium ions in reactions?

Back

Ammonium ions (NH4+) can act as a weak acid in reactions, often participating in acid-base reactions.

Front

What is the formula for potassium bromide?

Back

The formula for potassium bromide is KBr.

Front

What happens when KBr and (NH4)2S are mixed?

Back

No precipitate is formed when KBr and (NH4)2S are mixed, as all products remain soluble.

Front

What is the net ionic equation for the reaction of AgNO3 and CaCl2?

Back

Ag+(aq) + Cl-(aq) → AgCl(s) is the net ionic equation for the reaction.