Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between hydrofluoric acid (HF) and calcium hydroxide (Ca(OH)2). It begins by balancing the molecular equation, then assigns states to each substance, noting that HF is a weak acid and Ca(OH)2 is a strong base. The tutorial proceeds to split strong electrolytes into ions to form the complete ionic equation, identifies and removes spectator ions, and simplifies the net ionic equation. The video concludes by ensuring charge and mass conservation in the final equation.

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

• Split strong electrolytes into ions

• Determine the states of substances

• Identify spectator ions

• Balance the molecular equation

Which of the following is a weak acid in the reaction?

• Calcium hydroxide

• Hydrofluoric acid

• Water

• Fluoride ion

What is the state of calcium hydroxide in the reaction?

• Gas

• Aqueous

• Liquid

• Solid

Why do we not split HF into ions in the complete ionic equation?

• It is a strong acid

• It is a weak acid

• It is a solid

• It is a gas

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

• 1-

• 2+

• 1+

• 2-

Which ions are considered spectator ions in this reaction?

• Hydrogen ions

• Hydroxide ions

• Fluoride ions

• Calcium ions

What is the purpose of removing spectator ions?

• To determine the reactants

• To identify the products

• To simplify the equation

• To balance the equation

What is conserved in a net ionic equation?

• Both mass and charge

• Only charge

• Neither mass nor charge

• Only mass

How can the net ionic equation be simplified?

• By removing reactants

• By changing the states

• By reducing coefficients

• By adding more ions

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

• Balancing the molecular equation

• Determining the states of substances

• Ensuring mass and charge conservation

• Checking for spectator ions