Zinc Nitrate and Aqueous Solutions

The video tutorial explains how to write the equation for zinc nitrate (Zn(NO3)2) plus water (H2O). It covers the nature of ionic compounds, focusing on zinc as a transition metal with a specific charge and the nitrate ion's charge. The tutorial details how these charges interact to form a neutral compound through ionic bonding. It also describes the dissolution process of zinc nitrate in water, resulting in an aqueous solution, and explains the notation used to represent this in chemical equations.

What type of compound is formed when zinc nitrate reacts with water?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

What is the charge of zinc in zinc nitrate?

• 2+

• 3+

• 1+

• 4+

What is the charge of the nitrate ion?

• 1-

• 2-

• 3-

• 4-

How do the charges of zinc and nitrate ions balance each other?

• Zinc's 2+ charge is balanced by four nitrate ions each with a 1- charge

• Zinc's 2+ charge is balanced by three nitrate ions each with a 1- charge

• Zinc's 2+ charge is balanced by one nitrate ion with a 2- charge

• Zinc's 2+ charge is balanced by two nitrate ions each with a 1- charge

What happens to solid zinc nitrate when it is added to water?

• It forms a precipitate

• It remains solid

• It reacts to form a gas

• It dissolves and dissociates into ions

What does the term 'aqueous' mean in the context of zinc nitrate in water?

• Dissolved in water

• Liquid state

• Gaseous state

• Solid state

Why is it unnecessary to write water on the product side of the equation for zinc nitrate in water?

• Because water is a reactant, not a product

• Because water evaporates

• Because the 'aq' notation indicates the presence of water

• Because water is not involved in the reaction

What does the 'aq' notation signify in a chemical equation?

• The substance is in solid form

• The substance is in liquid form

• The substance is dissolved in water

• The substance is in gaseous form

What is the role of the subscript '2' in the formula Zn(NO3)2?

• Indicates two nitrogen atoms

• Indicates two oxygen atoms

• Indicates two nitrate ions

• Indicates two zinc atoms