Reactions of Magnesium with Water

The video explores the reaction between solid magnesium and water, highlighting the formation of hydrogen gas and magnesium hydroxide. It demonstrates the properties of hydrogen gas, including its combustibility, and explains the insolubility of magnesium hydroxide. The video also covers balancing the chemical equation for the reaction and discusses the different products formed when using steam instead of liquid water. The tutorial concludes with a recap of the key points.

What is initially observed when magnesium metal is placed in water?

• Immediate explosion

• No reaction at all

• Formation of bubbles

• Color change

What gas is produced when magnesium reacts with water?

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

What compound forms on the surface of magnesium during the reaction with water?

• Magnesium hydroxide

• Magnesium sulfate

• Magnesium chloride

• Magnesium oxide

Why does the formation of magnesium hydroxide slow down the reaction?

• It reacts with hydrogen gas

• It forms a protective layer on the metal

• It increases the temperature

• It is highly soluble in water

What is the balanced chemical equation for the reaction of magnesium with water?

• Mg + H2O → Mg(OH)2 + O2

• 2Mg + H2O → 2MgO + H2

• Mg + 2H2O → Mg(OH)2 + H2

• Mg + H2O → MgO + H2

What are the products when magnesium reacts with steam instead of liquid water?

• Magnesium sulfate and water

• Magnesium chloride and hydrogen

• Magnesium hydroxide and oxygen

• Magnesium oxide and hydrogen

What is the main difference in the products when using steam instead of liquid water in the reaction with magnesium?

• Formation of magnesium carbonate

• Formation of magnesium sulfate

• Formation of magnesium oxide

• Formation of magnesium chloride