Reactions with Oxygen

Question 1

Magnesium

Answer 1

• 2Mg + O2 = 2MgO
• Burns with a bright white light
• Gives a powdery ash of magnesium oxide
• Not very soluble in water but can dissolve to form an alkaline solution

Question 2

Sulfur

Answer 2

• S + O2 = SO2
• Burns with a blue flame
• Poisonous, colourless sulfur dioxide is produced
• Can dissolve in water to form sulfurous acid

Question 3

Hydrogen

Answer 3

• 2H2 + O2 = 2H2O
• Burns with a pale blue flame
• If you ignite a mixture of hydrogen and oxygen it will explode