Copper and Iron Reaction Concepts

The video demonstrates a single displacement reaction between copper (II) sulfate and iron. Initially, a saturated solution of copper (II) sulfate is prepared, which is blue due to copper ions. When iron is introduced, it replaces the copper, resulting in a coating of copper on the iron object. The blue color fades as copper is displaced, and iron sulfate forms in the solution. The video concludes with an explanation of the reaction based on the activity series, highlighting the transformation of copper and iron.

What is the main objective of the experiment involving copper (II) sulfate and iron?

• To observe the color change of iron

• To create a new alloy

• To coat the hammer with copper

• To dissolve the hammer in the solution

What indicates the presence of copper ions in the copper (II) sulfate solution?

• The solution becomes clear

• The solution turns red

• The solution turns blue

• The solution turns green

During the reaction, what happens to the copper ions in the solution?

• They are replaced by iron

• They evaporate

• They form a precipitate

• They dissolve further

What is the visual change observed on the hammer after the reaction?

• The hammer dissolves

• The hammer becomes rusty

• The hammer is coated with copper

• The hammer turns blue

Why is iron able to replace copper in the copper (II) sulfate solution?

• Iron is more reactive than copper

• Copper is more reactive than iron

• Copper is less dense than iron

• Iron is less dense than copper

What compound is formed in the solution after the reaction?

• Iron sulfate

• Copper nitrate

• Iron chloride

• Copper chloride

What happens to the blue color of the solution during the reaction?

• It remains unchanged

• It turns green

• It disappears

• It intensifies

What would you observe if the water in the solution is evaporated?

• Copper sulfate crystals

• Iron sulfate crystals

• Iron crystals

• Copper crystals

What is the chemical formula for the iron compound formed in the solution?

• FeSO4

• FeCl2

• Fe2O3

• Fe(NO3)2