Chemical Reactions: Oxidation and Reduction

The video explains redox reactions, focusing on magnesium and aluminum. Magnesium loses electrons to form ions, while oxygen gains electrons in a redox reaction. The simultaneous occurrence of oxidation and reduction is highlighted. The video also covers the reaction between aluminum and copper chloride, where aluminum is oxidized and copper is reduced, resulting in the deposition of copper metal.

What happens to a magnesium atom during oxidation?

• It loses 4 electrons.

• It gains 4 electrons.

• It loses 2 electrons.

• It gains 2 electrons.

In a redox reaction, what occurs when an atom is reduced?

• It loses electrons.

• It gains electrons.

• It remains unchanged.

• It forms a neutral atom.

What is formed when magnesium burns in oxygen?

• Magnesium chloride

• Magnesium nitrate

• Magnesium oxide

• Magnesium sulfate

During the reaction between aluminum and copper chloride, what happens to the aluminum atoms?

• They lose 3 electrons.

• They gain 3 electrons.

• They gain 2 electrons.

• They lose 2 electrons.

What is the result of the reduction of copper ions in the reaction with aluminum?

• Copper ions remain in solution.

• Copper metal is deposited.

• Copper oxide is formed.

• Copper chloride is formed.