Balancing Chemical Reactions and Ionic Equations

This video tutorial explains how to write and balance the net ionic equation for the reaction between sodium bromide (NaBr) and lead(II) nitrate (Pb(NO3)2). It begins with balancing the molecular equation, followed by determining the solubility and states of the compounds involved. 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. The video concludes by highlighting the conservation of charge and mass in the reaction.

What is the first step in balancing the molecular equation for the reaction between sodium bromide and lead(II) nitrate?

• Identify the spectator ions.

• Write the net ionic equation.

• Determine the solubility of each compound.

• Balance the number of atoms for each element.

Which of the following is generally true about the solubility of sodium compounds?

• They are soluble only in acidic solutions.

• They are generally soluble.

• They are usually insoluble.

• They are soluble only in basic solutions.

What is the state of lead(II) bromide in the reaction?

• Aqueous

• Gas

• Solid

• Liquid

When forming the complete ionic equation, what is done with strong electrolytes?

• They are ignored.

• They are converted into gases.

• They are split into their respective ions.

• They are left as whole compounds.

What is the charge of the lead ion in the reaction?

• 4+

• 3+

• 2+

• 1+

What is the purpose of identifying spectator ions in a reaction?

• To balance the equation.

• To determine the solubility.

• To find the reaction rate.

• To simplify the net ionic equation.

Which ions are considered spectator ions in this reaction?

• Sodium and nitrate ions

• Only nitrate ions

• Lead and bromide ions

• Only sodium ions

What is conserved in the net ionic equation?

• Both mass and charge

• Only charge

• Only mass

• Neither mass nor charge

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

• It is heavier.

• It is more reactive.

• It is a standard convention.

• It is less reactive.

What is the final product of the reaction between sodium bromide and lead(II) nitrate?

• Sodium nitrate

• Lead(II) bromide

• Sodium bromide

• Lead(II) nitrate