Net Ionic Equations and Spectator Ions

This video tutorial explains how to write a balanced net ionic equation for the reaction between hydrobromic acid (HBr) and potassium hydroxide (KOH). It covers the identification of strong acids and bases, the importance of solubility rules, and the process of dissociating compounds into ions. The tutorial also demonstrates how to form the complete ionic equation and derive the net ionic equation by removing spectator ions, ensuring charge and atom balance.

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

• Balance the molecular equation

• Identify spectator ions

• Memorize strong acids and bases

• Write the states of matter

Why is it important to know the states of matter for each substance?

• To know which substances will dissociate into ions

• To calculate the reaction rate

• To determine the color of the solution

• To identify the temperature of the reaction

Which of the following is a strong acid that completely dissociates in water?

• HBr

• HCl

• H2SO4

• HF

What is the role of solubility rules in writing ionic equations?

• To measure the temperature change

• To calculate the pH of the solution

• To determine which compounds are soluble and dissociate

• To predict the color change

What is the complete ionic equation?

• An equation showing only the spectator ions

• An equation showing all ions present in the reaction

• An equation showing only the products

• An equation showing only the reactants

What are spectator ions?

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that change color during the reaction

• Ions that form a precipitate

How do you identify spectator ions in an ionic equation?

• They are only present in the products

• They are only present in the reactants

• They are the ions that form a solid

• They appear unchanged on both sides of the equation

What is the net ionic equation for the reaction between HBr and KOH?

• K+ + Br- → KBr

• H2O → H+ + OH-

• H+ + OH- → H2O

• HBr + KOH → KBr + H2O

Why is it important to ensure charge conservation in a net ionic equation?

• To maintain electrical neutrality

• To ensure the reaction is exothermic

• To balance the equation

• To predict the reaction rate

What does it mean for an equation to be balanced in terms of atoms?

• The equation has equal numbers of compounds on both sides

• The equation has equal numbers of molecules on both sides

• The equation has equal numbers of ions on both sides

• The equation has equal numbers of atoms of each element on both sides