Net Ionic Equations and Spectator Ions

This video tutorial explains how to write a balanced net ionic equation for the reaction between sodium hydroxide (NaOH) and magnesium bromide (MgBr2). It begins with balancing the molecular equation, then determining the states of each substance. The tutorial proceeds to form the complete ionic equation by splitting strong electrolytes into ions. Finally, it identifies and removes spectator ions to derive the net ionic equation, ensuring charge and atom balance.

What is the main objective of the video tutorial?

• To explore the properties of gases

• To learn about the periodic table

• To write a balanced net ionic equation

• To understand chemical bonding

What is the first step in balancing the molecular equation for NaOH and MgBr2?

• Determining the solubility

• Identifying the spectator ions

• Balancing the number of atoms

• Balancing the charges

Why is sodium hydroxide considered a strong electrolyte?

• It is insoluble in water

• It is a weak acid

• It dissociates completely into ions

• It forms a precipitate

Which compound is considered insoluble in water in this reaction?

• Sodium bromide

• Magnesium bromide

• Magnesium hydroxide

• Sodium hydroxide

What is the charge of sodium ions in the complete ionic equation?

• 2-

• 1-

• 1+

• 2+

What are spectator ions in a chemical reaction?

• 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 removed to derive the net ionic equation?

• Spectator ions

• Only positive ions

• All ions

• Only negative ions

What is the final product in the net ionic equation for NaOH and MgBr2?

• Magnesium hydroxide

• Magnesium bromide

• Sodium bromide

• Sodium hydroxide

How is charge conservation ensured in the net ionic equation?

• By balancing the number of atoms

• By ensuring equal positive and negative charges

• By removing all ions

• By adding more reactants

Why might the positive ion be written first in the net ionic equation?

• It is heavier

• It is more reactive

• It is less soluble

• It is a standard convention