Chemical Reactions and Ionic Equations

The video tutorial explains how to write the balanced net ionic equation for the decomposition of copper(II) hydroxide. It begins with balancing the molecular equation, followed by determining the states of the compounds using solubility rules. The tutorial then discusses the complete and net ionic equations, emphasizing that solids, liquids, and gases are not split into ions. The video concludes by summarizing that the decomposition of copper(II) hydroxide into copper(II) oxide and water does not result in a net ionic equation due to the lack of ion formation.

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

• Balance the molecular equation

• Write the complete ionic equation

• Determine the solubility of compounds

• Identify the spectator ions

According to solubility rules, what is the general solubility of hydroxides?

• Soluble

• Insoluble

• Soluble only in acids

• Soluble only in bases

What state symbol is used for insoluble compounds in a chemical equation?

• (s)

• (g)

• (aq)

• (l)

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

• To determine the color of compounds

• To balance the equation

• To determine the states of compounds

• To identify spectator ions

Which of the following is not split into ions in a net ionic equation?

• Aqueous solutions

• Solids

• Strong acids

• Strong bases

Which of the following is a strong electrolyte?

• Water

• Copper(II) hydroxide

• Sodium chloride

• Copper(II) oxide

What is the complete ionic equation for copper(II) hydroxide decomposing?

• Cu(OH)2 (s) → CuO (s) + H2O (l)

• Cu2+ + 2OH- → CuO + H2O

• Cu(OH)2 (aq) → Cu2+ + 2OH-

• CuO + H2O → Cu(OH)2

Why is there no net ionic equation for the decomposition of copper(II) hydroxide?

• Because it forms a gas

• Because no ions are formed

• Because it is a redox reaction

• Because it is a reversible reaction

What happens to copper(II) hydroxide in water according to the video?

• It forms a gas

• It reacts with water

• It remains mostly solid

• It dissolves completely

What is the final product when copper(II) hydroxide decomposes?

• Copper metal

• Copper(II) sulfate

• Copper(II) oxide and water

• Copper(II) chloride