Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between lithium phosphate and strontium hydroxide. It begins with balancing the molecular equation, focusing on the strontium and lithium ions. The tutorial then discusses the solubility of compounds and identifies the states of each substance. It proceeds to split strong electrolytes into ions for the complete ionic equation, highlighting spectator ions. Finally, it emphasizes the importance of conserving charge and balancing atoms in the net ionic equation.

What is the first step in writing a net ionic equation?

• Identify spectator ions

• Write the complete ionic equation

• Balance the molecular equation

• Determine solubility

When balancing the molecular equation, which element was found to be easier to start with?

• Hydroxide

• Strontium

• Phosphate

• Lithium

Which compound is considered a strong base and soluble?

• Strontium hydroxide

• Strontium phosphate

• Lithium phosphate

• Lithium chloride

What happens to strontium phosphate in the reaction?

• It remains unchanged

• It forms a gas

• It dissolves completely

• It precipitates as a solid

What are spectator ions?

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that form a precipitate

• Ions that are insoluble

Which ions are crossed out in the complete ionic equation?

• All ions

• Ions that change state

• Spectator ions

• Ions that form a solid

What is the net charge of the reactants in the net ionic equation?

• Zero

• Negative

• Variable

• Positive

How is charge conservation ensured in the net ionic equation?

• By removing spectator ions

• By adding more ions

• By ensuring the net charge is zero

• By balancing atoms

What is the final step in writing a net ionic equation?

• Determining solubility

• Balancing the molecular equation

• Identifying spectator ions

• Ensuring charge and atom balance

What is the net ionic equation for the reaction between lithium phosphate and strontium hydroxide?

• 3Sr^2+ + 2PO4^3- → Sr3(PO4)2

• Li3PO4 + Sr(OH)2 → Sr3(PO4)2 + LiOH

• 3Li+ + PO4^3- + 3Sr^2+ + 6OH- → Sr3(PO4)2 + 6Li+ + 6OH-

• Li3PO4 + Sr(OH)2 → 3Li+ + 2PO4^3- + 3Sr^2+ + 6OH-