Net Ionic Equations and Reactions

This video tutorial explains how to write a balanced net ionic equation for the reaction between hydroiodic acid (HI) and sodium hydroxide (NaOH). It begins with balancing the molecular equation, then determining the states of each substance. The tutorial proceeds to split strong electrolytes into ions to form the complete ionic equation. Finally, it identifies and crosses out spectator ions to derive the net ionic equation, ensuring both charge and mass are conserved.

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

• Write the states of substances

• Balance the molecular equation

• Split strong electrolytes into ions

• Identify spectator ions

Which of the following is a strong acid?

• HCl

• HI

• H2SO4

• HNO3

What state is assigned to sodium hydroxide in the reaction?

• Liquid

• Solid

• Gas

• Aqueous

What is the charge of the iodide ion?

• 2-

• 1+

• 2+

• 1-

Which ions are considered spectator ions in this reaction?

• Hydrogen and hydroxide ions

• Sodium and iodide ions

• Sodium and hydroxide ions

• Hydrogen and iodide ions

What is the net ionic equation for the reaction between HI and NaOH?

• H2O → H+ + OH-

• Na+ + I- → NaI

• NaOH + HI → NaI + H2O

• H+ + OH- → H2O

Why do we not split liquids in net ionic equations?

• They do not dissociate into ions

• They are already balanced

• They are not strong electrolytes

• They are not involved in the reaction

What is conserved in a net ionic equation?

• Neither mass nor charge

• Both mass and charge

• Only mass

• Only charge

How many hydrogen atoms are present on each side of the net ionic equation?

• Four

• One

• Two

• Three

What is the role of Dr. B in the video?

• He is a narrator

• He is a student

• He is a spectator

• He is a chemist