Suppose solutions of magnesium acetate and potassium sulfide...

Suppose solutions of magnesium acetate and potassium sulfide were mixed. If a reaction occurred, the products would be magnesium sulfide and potassium acetate, both of which are soluble. Write the balanced formula unit equation, the total ionic equation, and the net ionic equation for this reaction. Did you get the same net ionic equation as you obtained in Exercise $122 ?$ Explain your finding.

Key Concepts

Double Displacement Reaction

Double displacement reactions involve the exchange of ions between two compounds in solution, forming two new compounds. This reaction type relies on the solubility properties of the participating compounds to determine whether a reaction occurs, such as precipitate formation, gas evolution, or production of a weak electrolyte.

Balanced Formula Unit Equation

The balanced formula unit equation represents the chemical reaction using the complete formulae for both reactants and products, ensuring that the number of each type of atom and the overall charge are the same on both sides of the equation.

Total Ionic Equation

The total ionic equation splits all strong electrolytes present in an aqueous reaction into their constituent ions, providing a detailed view of all the ionic species in the solution. This step is essential for identifying the ions that actually participate in the chemical change.

Net Ionic Equation

The net ionic equation is derived from the total ionic equation by removing the spectator ions—those ions that do not participate directly in the reaction. What remains is a simplified equation that shows only the species that undergo a change during the reaction.

Spectator Ions

Spectator ions are the ions present in the aqueous solution that do not participate in the chemical transformation during a reaction. They appear on both sides of the total ionic equation and are omitted in the net ionic equation since they remain unchanged.

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