Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through writing the balanced net ionic equation for the reaction between potassium iodide (KI) and bromine gas (Br2). It begins with balancing the molecular equation, assigning states to each substance, and then splitting strong electrolytes into ions to form the complete ionic equation. The tutorial proceeds to derive the net ionic equation by removing spectator ions, ensuring charge and mass conservation. The video concludes with a summary of the balanced net ionic equation.

What is the first step in balancing the molecular equation for the reaction between KI and Br2?

• Write the net ionic equation

• Determine the solubility of KI

• Identify the spectator ions

• Balance the number of bromine atoms

Which state symbol is used for potassium iodide (KI) in the reaction?

• (g) for gas

• (aq) for aqueous

• (s) for solid

• (l) for liquid

What is the state of bromine (Br2) in the reaction?

• Aqueous

• Solid

• Liquid

• Gas

How do you represent potassium ions in the complete ionic equation?

• K2-

• K-

• K2+

• K+

Why is iodine (I2) not split into ions in the complete ionic equation?

• It is a solid

• It is a liquid

• It is a gas and not a strong electrolyte

• It is a strong electrolyte

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

• To identify the reactants

• To balance the equation

• To simplify the equation by removing them

• To determine the solubility

Which ions are considered spectator ions in this reaction?

• Iodide ions

• Bromide ions

• Iodine molecules

• Potassium ions

What is conserved in the balanced net ionic equation?

• Neither mass nor charge

• Both mass and charge

• Only charge

• Only mass

What is the final product of the reaction between KI and Br2 in the net ionic equation?

• KBr2 and I

• K2 and BrI

• KI and Br2

• KBr and I2

What is the significance of ensuring charge conservation in the net ionic equation?

• It identifies the reactants

• It determines the solubility

• It helps identify spectator ions

• It ensures the equation is balanced