Net Ionic Equations and Balancing

The video tutorial explains how to write a balanced net ionic equation for the reaction between chromium(III) nitrate and sodium sulfide. It begins with balancing the molecular equation, followed by determining the states of each substance using solubility rules. The tutorial then demonstrates how to form the complete ionic equation, identify and remove spectator ions, and finalize the net ionic equation while ensuring charge conservation. The process highlights the importance of balancing both atoms and charges in chemical reactions.

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

• Identify the spectator ions

• Write the complete ionic equation

• Balance the molecular equation

• Determine the solubility of compounds

How do you balance the number of chromium atoms in the molecular equation?

• Add a coefficient of 1 in front of chromium(III) nitrate

• Add a coefficient of 6 in front of nitrate ions

• Add a coefficient of 2 in front of chromium(III) nitrate

• Add a coefficient of 3 in front of sodium sulfide

Which of the following compounds is generally insoluble?

• Potassium nitrate

• Sodium chloride

• Chromium(III) sulfide

• Sodium nitrate

What type of reaction occurs when chromium(III) sulfide precipitates?

• Decomposition reaction

• Double displacement reaction

• Synthesis reaction

• Single displacement reaction

What is the purpose of writing a complete ionic equation?

• To balance the molecular equation

• To identify the precipitate

• To determine the solubility of compounds

• To split strong electrolytes into ions

Which ions are considered spectator ions in this reaction?

• Sodium ions

• Nitrate ions

• Sulfide ions

• Chromium ions

What is the net charge of the final net ionic equation?

• 6+

• 6-

• 0

• 3+

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

• To identify the precipitate

• To ensure the reaction is neutral

• To determine the solubility

• To balance the number of atoms

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

• Balancing the molecular equation

• Identifying spectator ions

• Ensuring charge and atom balance

• Determining solubility

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

• To explain the balanced net ionic equation

• To demonstrate a chemical experiment

• To introduce new chemical compounds

• To discuss the history of chemistry