Copper Reactions and Properties

Mrs. V demonstrates a chemical reaction between copper oxide and sulfuric acid in the lockdown lab. The reaction is enhanced by heating the acid, leading to a color change from black to blue, indicating the formation of copper sulfate. The video concludes with a balanced chemical equation and explanation of the reaction process.

Why is the sulfuric acid heated before starting the reaction?

• To make it less acidic

• To increase the rate of reaction

• To change its color

• To make it evaporate faster

What is the appearance of copper oxide used in the experiment?

• A blue liquid

• A white powder

• A black powder

• A red solid

What color change indicates the reaction between copper oxide and sulfuric acid?

• From yellow to purple

• From blue to black

• From red to green

• From black to blue

What type of chemical reaction occurs between a metal oxide and an acid?

• It produces a metal salt and water

• It produces a gas and a metal

• It produces a base and hydrogen

• It produces an acid and a salt

What is the chemical formula for copper(II) sulfate?

• CuSO4

• Cu2SO4

• CuO2

• CuS

Which of the following is the correct balanced equation for the reaction?

• CuO + H2SO4 → CuSO4 + H2

• Cu + H2SO4 → CuSO4 + H2

• CuO + H2SO4 → Cu + SO4 + H2O

• CuO + H2SO4 → CuSO4 + H2O

What is the state of copper oxide in the reaction?

• Liquid

• Gas

• Solid

• Aqueous

What is the state of sulfuric acid in the reaction?

• Gas

• Solid

• Aqueous

• Liquid

What is the state of copper sulfate after the reaction?

• Solid

• Gas

• Aqueous

• Liquid