Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between hydrobromic acid (HBr) and barium hydroxide (Ba(OH)2). It begins with balancing the molecular equation, followed by determining the states of each substance. The tutorial then demonstrates how to split strong electrolytes into ions to form the complete ionic equation. Spectator ions are identified and removed to derive the net ionic equation. Finally, the equation is simplified, ensuring charge and mass conservation, and the tutorial concludes with a brief summary.

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

• Identify spectator ions

• Balance the molecular equation

• Write the states of substances

• Split strong electrolytes into ions

Why is it important to memorize strong acids and bases when writing net ionic equations?

• They do not dissociate in water

• They are weak electrolytes

• They dissociate completely in water

• They are always insoluble

What is the state symbol for a substance that dissociates completely in water?

• aq

• g

• l

• s

What is the charge of a hydrogen ion in the complete ionic equation?

• 2+

• 2-

• 1+

• 1-

Which of the following ions is a spectator ion in the reaction between HBr and Ba(OH)2?

• Hydroxide ion

• Barium ion

• Hydrogen ion

• Bromide ion

What is the purpose of removing spectator ions in a net ionic equation?

• To determine the reactants

• To simplify the equation

• To identify the products

• To balance the equation

What is the net ionic equation for the reaction between HBr and Ba(OH)2?

• HBr + Ba(OH)2 → BaBr2 + H2O

• Ba2+ + 2Br- → BaBr2

• H+ + OH- → H2O

• 2H+ + 2OH- → 2H2O

How can the coefficients in the net ionic equation be simplified?

• By adding 1 to each

• By subtracting 1 from each

• By dividing them by 2

• By multiplying them by 2

What must be conserved in a net ionic equation?

• Only mass

• Only charge

• Both charge and mass

• Neither charge nor mass

What is the final step in ensuring the net ionic equation is correct?

• Ensuring charge and mass conservation

• Balancing the molecular equation

• Checking for spectator ions

• Writing the states of substances