Balancing Double Displacement Reactions

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

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

• Decomposition reaction

• Synthesis reaction

• Double displacement reaction

• Single displacement reaction

How many copper atoms are present in the reactants?

• Three

• Two

• One

• None

What is the role of sulfate in the reaction?

• It decomposes into sulfur and oxygen

• It remains unchanged and is counted as a single unit

• It reacts with potassium

• It forms a new compound with carbonate

How many potassium atoms are present in the reactants?

• One

• Two

• Four

• Three

What is the total number of carbonate ions in the products?

• Two

• Three

• None

• One

What is the coefficient of copper(II) sulfate in the balanced equation?

• 3

• 0

• 1

• 2

Why is it useful to count polyatomic ions as single units in double displacement reactions?

• It simplifies the counting process and reduces errors

• It is not useful at all

• It makes the process slower

• It increases the chance of error

What is the main advantage of the method described for balancing double displacement reactions?

• It requires more detailed calculations

• It is faster and less prone to mistakes

• It is only applicable to single displacement reactions

• It requires memorizing all individual atom counts