(a) Use the solubility rules to write the balanced net ionic...

(a) Use the solubility rules to write the balanced net ionic equation for each of the following "molecular" reactions. If there is no net reaction, write "NR." (b) Which of these three reactions give clear visual evidence of the ion exchange process? 1. $\mathrm{BaCl}_{2}(a q)+\mathrm{Na}_{2} \mathrm{CO}_{3}(a q) \rightarrow \mathrm{BaCO}_{3}(s)+\mathrm{NaCl}(a q)$ 2. $\mathrm{NaCl}(a q)+\mathrm{KOH}(a q) \rightarrow \mathrm{NaOH}(a q)+\mathrm{KCl}(a q)$ 3. $\mathrm{Na}_{3} \mathrm{PO}_{4}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow \mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}(s)+\mathrm{NaCl}(a q)$

(a) Use the solubility rules to write the balanced net ionic equation for each of the following "molecular" reactions. If there is no net reaction, write "NR." (b) Which of these three reactions give clear visual evidence of the ion exchange process?
1. $\mathrm{BaCl}_{2}(a q)+\mathrm{Na}_{2} \mathrm{CO}_{3}(a q) \rightarrow \mathrm{BaCO}_{3}(s)+\mathrm{NaCl}(a q)$
2. $\mathrm{NaCl}(a q)+\mathrm{KOH}(a q) \rightarrow \mathrm{NaOH}(a q)+\mathrm{KCl}(a q)$
3. $\mathrm{Na}_{3} \mathrm{PO}_{4}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow \mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}(s)+\mathrm{NaCl}(a q)$

Key Concepts

Precipitation Reactions

Precipitation reactions are a type of double displacement reaction where one of the products is an insoluble solid, or precipitate. The formation of a precipitate provides direct visual evidence that a chemical reaction has occurred, indicating the process of ion exchange.

Double Displacement Reactions

Double displacement reactions involve the exchange of ions between two compounds resulting in the formation of two new compounds. This type of reaction is common in aqueous solutions and is the basis for understanding precipitation reactions and ion exchange processes.

Solubility Rules

Solubility rules are guidelines used to predict whether an ionic compound will dissolve in water. They help determine which reaction products remain in solution and which form precipitates during a double displacement reaction.

Net Ionic Equations

Net ionic equations display only the species that undergo a chemical change during a reaction by omitting the spectator ions. This focused representation makes it easier to understand the actual chemical processes taking place.

Spectator Ions

Spectator ions are ions that remain unchanged in both the reactants and products in a chemical reaction. They do not participate in the formation of the precipitate or any other reaction event and are excluded from the net ionic equation.

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