Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between sodium iodide (NaI) and bromine (Br2). It begins by balancing the molecular equation, then identifies the states of each substance, noting that compounds with sodium are soluble and dissociate into ions. The tutorial proceeds to write the complete ionic equation and removes spectator ions to derive the net ionic equation. The final section ensures the equation is balanced in terms of charge and atoms, emphasizing that molecular compounds like Br2 and I2 remain intact in aqueous solutions.

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

• Write the complete ionic equation

• Identify spectator ions

• Determine the states of substances

• Balance the molecular equation

When balancing the molecular equation for NaI and Br2, what coefficient is placed in front of NaI?

• 2

• 4

• 1

• 3

Which of the following is true about compounds with sodium in aqueous solutions?

• They remain as molecules

• They form weak electrolytes

• They are insoluble

• They dissociate into ions

What is the state of molecular bromine in the reaction?

• Gas

• Aqueous

• Liquid

• Solid

What is the purpose of identifying spectator ions in a complete ionic equation?

• To simplify to the net ionic equation

• To balance the equation

• To identify the limiting reactant

• To determine the reaction rate

Which ions are considered spectator ions in the reaction between NaI and Br2?

• Sodium ions

• Bromide ions

• Hydrogen ions

• Iodide ions

Why are Br2 and I2 not split into ions in the net ionic equation?

• They are strong electrolytes

• They are weak acids

• They are molecular compounds

• They are gases

What ensures that the net ionic equation is correctly balanced?

• Equal number of ions

• Equal number of reactants and products

• Equal number of atoms and charges

• Equal number of molecules

What happens to the charge on both sides of the net ionic equation?

• It is doubled

• It is balanced

• It is different

• It is halved

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

• Determining the states of substances

• Balancing the molecular equation

• Ensuring charge and atom balance

• Identifying spectator ions