Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between nitric acid (HNO3) and strontium hydroxide (Sr(OH)2). It begins by balancing the molecular equation, ensuring equal numbers of each type of atom on both sides. The video then assigns states to each substance based on solubility rules, identifying which are aqueous, solid, or liquid. Next, it demonstrates how to split strong electrolytes into their ions to form the complete ionic equation. Finally, the tutorial shows how to derive the net ionic equation by removing spectator ions, leaving only the ions that participate in the reaction.

What is the primary goal of writing a net ionic equation?

• To list all reactants and products

• To show only the species that participate in the reaction

• To balance the number of atoms on both sides

• To determine the solubility of compounds

When balancing the molecular equation, what is adjusted to achieve balance?

• The subscripts in the formulas

• The charges on the ions

• The coefficients of the compounds

• The chemical formulas

Which of the following is generally insoluble in water?

• Ammonium compounds

• Nitrates

• Group 1 hydroxides

• Strontium hydroxide

What state is assigned to nitric acid in the reaction?

• Solid

• Liquid

• Gas

• Aqueous

What is the charge of a nitrate ion?

• 2-

• 1+

• 2+

• 1-

In the complete ionic equation, which substances are not split into ions?

• Aqueous solutions

• Solids and liquids

• Gases

• All reactants

What is the purpose of identifying spectator ions?

• To balance the equation

• To simplify the net ionic equation

• To determine solubility

• To calculate molar mass

Which ions are considered spectator ions in this reaction?

• Hydroxide ions

• Nitrate ions

• Strontium ions

• Hydrogen ions

What is the net ionic equation primarily used for?

• To focus on the chemical change occurring

• To determine the physical state of compounds

• To show all reactants and products

• To highlight the ions that do not change

What happens to the spectator ions in the net ionic equation?

• They are balanced separately

• They are included in the equation

• They are removed from the equation

• They are highlighted