Double Displacement Reactions and Balancing

The video tutorial explains how to balance a chemical equation involving copper(II) sulfate and potassium carbonate, a double displacement reaction. It demonstrates a method to quickly count atoms by treating polyatomic ions as single units, ensuring the equation is balanced on both sides. The tutorial concludes with tips for efficient balancing.

What type of reaction is copper(II) sulfate reacting with potassium carbonate?

• Single displacement reaction

• Double displacement reaction

• Synthesis reaction

• Decomposition reaction

How many copper atoms are present in the reactants?

• Three

• Two

• None

• One

What is the role of sulfate in the reaction?

• It remains unchanged and is counted as one unit

• It changes into a different ion

• It decomposes into sulfur and oxygen

• It reacts with potassium

How many potassium atoms are present in the products?

• Three

• Two

• One

• Four

What is the total number of carbonate ions on the product side?

• One

• Two

• Three

• None

What can be said about the balance of the equation?

• It is unbalanced

• It is balanced with coefficients 1, 1, 1, 1

• It requires additional balancing

• It is balanced with coefficients 2, 2, 2, 2

What is a useful tip for balancing double displacement reactions?

• Count polyatomic ions as single units if they appear unchanged

• Ignore polyatomic ions

• Balance only the metals first

• Count each atom separately

Who is the presenter of the tutorial?

• Dr. A

• Dr. B

• Dr. C

• Dr. D