Net Ionic Equations and Acid-Base Concepts

The video tutorial explains how to write a balanced net ionic equation for the reaction between potassium hydroxide (KOH) and nitrous acid (HNO2). It covers the steps of balancing the molecular equation, determining the states of substances, splitting strong electrolytes into ions, and identifying weak acids. The tutorial also demonstrates how to write complete ionic equations, identify spectator ions, and ensure the conservation of charge and mass in the net ionic equation.

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

• Determine the states of substances

• Balance the molecular equation

• Identify spectator ions

• Write the complete ionic equation

Which of the following is a strong base?

• HCl

• KOH

• HNO2

• NH3

Why is HNO2 considered a weak acid?

• It does not dissociate at all

• It completely dissociates in water

• It is not an acid

• It only partially dissociates in water

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

• +2

• -1

• +1

• 0

What is the purpose of writing a complete ionic equation?

• To identify the states of substances

• To determine the net ionic equation

• To balance the molecular equation

• To show all ions present in the reaction

Which ion is considered a spectator ion in the reaction between KOH and HNO2?

• OH-

• H+

• K+

• NO2-

What is removed from the complete ionic equation to form the net ionic equation?

• Water molecules

• Weak acids

• Spectator ions

• All ions

What must be conserved in a balanced net ionic equation?

• Both mass and charge

• Only charge

• Only mass

• Neither mass nor charge

In the reaction between KOH and HNO2, which ion is not split in the net ionic equation?

• NO2-

• K+

• OH-

• HNO2

Which of the following is not a step in deriving the net ionic equation?

• Adding new ions

• Identifying spectator ions

• Balancing the molecular equation

• Writing the complete ionic equation