Writing Net Ionic Equations for Double Replacement Reactions

This video tutorial explains how to write net ionic equations, starting with predicting products in a double replacement reaction. It covers solubility rules, balancing molecular equations, and converting them into total and net ionic equations. The tutorial includes two examples: one with sodium iodide and lead nitrate, and another with potassium phosphate and magnesium chloride, demonstrating the process of identifying spectator ions and writing net ionic equations.

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

• Predicting the products

• Balancing the equation

• Identifying spectator ions

• Writing the molecular equation

Which of the following compounds is always soluble?

• Silver chloride

• Lead iodide

• Sodium nitrate

• Magnesium phosphate

What is the charge of the lead ion in lead nitrate?

• +3

• +2

• +1

• +4

What is the purpose of balancing a molecular equation?

• To predict the products

• To identify spectator ions

• To ensure mass conservation

• To determine solubility

Which ions are considered spectator ions in the reaction of sodium iodide and lead nitrate?

• Lead and iodide ions

• Lead and nitrate ions

• Sodium and nitrate ions

• Sodium and iodide ions

What is the net ionic equation for the reaction between sodium iodide and lead nitrate?

• 2Na+ + 2NO3- → 2NaNO3

• 2I- + Pb2+ → PbI2

• 2Na+ + 2I- + Pb2+ + 2NO3- → PbI2 + 2Na+ + 2NO3-

• NaI + Pb(NO3)2 → PbI2 + 2NaNO3

What type of reaction occurs when two aqueous solutions form a solid product?

• Decomposition reaction

• Precipitation reaction

• Synthesis reaction

• Combustion reaction

What is the solubility of potassium chloride?

• Soluble

• Insoluble

• Depends on temperature

• Partially soluble

How do you determine the subscripts in a compound using the crisscross method?

• By using the solubility rules

• By using the atomic numbers

• By using the charges of the ions

• By using the molecular weights

What is the net ionic equation for the reaction between potassium phosphate and magnesium chloride?

• 6K+ + 2PO4^3- + 3Mg2+ + 6Cl- → 2K3PO4 + 3MgCl2

• 2PO4^3- + 3Mg2+ → Mg3(PO4)2

• K3PO4 + MgCl2 → Mg3(PO4)2 + 3KCl

• 6K+ + 6Cl- → 6KCl