Net Ionic Equations and Balancing

The video tutorial explains how to write a balanced net ionic equation for the reaction between sodium hydroxide and magnesium sulfate. It begins by balancing the molecular equation and determining the states of each substance. The tutorial then proceeds to write the complete ionic equation by splitting strong electrolytes into their ions. Spectator ions are identified and removed to derive the net ionic equation. The video concludes by ensuring charge conservation and atom balance in the final equation.

What is the first step in balancing the molecular equation for the reaction between NaOH and MgSO4?

• Balance the magnesium atoms.

• Balance the hydroxide groups.

• Balance the sodium atoms.

• Balance the sulfate groups.

What state is sodium hydroxide in during the reaction?

• Aqueous

• Gas

• Liquid

• Solid

Why is magnesium hydroxide considered insoluble?

• It dissolves only slightly or not at all in water.

• It is a gas at room temperature.

• It is a strong electrolyte.

• It dissolves completely in water.

What ions are formed when sodium hydroxide dissociates in water?

• Hydrogen ions and oxygen ions

• Magnesium ions and sulfate ions

• Sodium ions and hydroxide ions

• Sodium ions and sulfate ions

Which of the following is NOT a spectator ion in the reaction?

• Sodium ion

• Hydroxide ion

• Sulfate ion

• Magnesium ion

What is the purpose of removing spectator ions in a chemical equation?

• To determine the products

• To identify the reactants

• To balance the equation

• To simplify the equation

What is the net ionic equation for the reaction between NaOH and MgSO4?

• Mg^2+ + 2OH- → Mg(OH)2

• NaOH + MgSO4 → Na2SO4 + Mg(OH)2

• Na+ + OH- → NaOH

• 2Na+ + SO4^2- → Na2SO4

How is charge conservation demonstrated in the net ionic equation?

• By having more positive charges than negative charges

• By having more negative charges than positive charges

• By having no charges at all

• By having equal numbers of positive and negative charges

What is the significance of balancing atoms in a chemical equation?

• To increase the reaction rate

• To ensure the equation is aesthetically pleasing

• To comply with the law of conservation of mass

• To make the equation easier to read

Why might the positive ion be placed first in net ionic equations?

• It changes the reaction outcome

• It is necessary for charge balance

• It is a convention for aesthetic purposes

• It is a requirement by IUPAC