Cobalt(II) Sulfate and Water Concepts

The video tutorial explains the chemical equation for cobalt(II) sulfate in water. It begins by introducing cobalt sulfate as an ionic compound and discusses its solubility in water. The video then details how cobalt sulfate dissociates into ions when dissolved, emphasizing the importance of solubility rules. Different methods of representing the chemical equation are also covered, including the placement of water in the equation. The tutorial concludes with a summary of the key points discussed.

What is the initial state of cobalt(II) sulfate before it is added to water?

• Plasma

• Solid

• Liquid

• Gas

What type of compound is formed by cobalt and sulfate?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

Which of the following is true about the solubility of cobalt(II) sulfate in water?

• It is insoluble in water.

• It is always insoluble.

• It is soluble in water with exceptions.

• It is soluble without exceptions.

What happens to cobalt(II) sulfate when it dissolves in water?

• It forms a new compound.

• It remains as a solid.

• It dissociates into ions.

• It evaporates.

What is the charge on the sulfate ion when cobalt(II) sulfate dissociates in water?

• 1-

• 2-

• 1+

• 2+

What does the notation 'aq' signify in the context of cobalt(II) sulfate in water?

• Solid state

• Aqueous or dissolved in water

• Gaseous state

• Liquid state

Where can water be placed in the chemical equation for cobalt(II) sulfate and water?

• Only on the product side

• Only on the reactant side

• Nowhere in the equation

• Above the arrow or on the reactant side

Why might it be redundant to write water again in the products of the equation?

• Because water is not involved in the reaction

• Because the reaction does not occur

• Because water evaporates

• Because 'aq' already indicates dissolution in water

Who is the presenter of the video?

• Dr. D

• Dr. C

• Dr. B

• Dr. A