Laboratory Preparation of Hydrogen
Interactive Chemistry Simulation for School Students
Apparatus Required
Flat Bottom Flask (with side arm)
Thistle Funnel
Delivery Tube
Pneumatic Trough
Gas Jar
Zinc Granules (Zn)
Dilute Hydrochloric Acid (HCl)
Chemical Reaction
Zn + 2HCl → ZnCl2 + H2↑
Zinc reacts with dilute hydrochloric acid to produce zinc chloride and hydrogen gas.
Key Points
H₂ is collected by downward displacement of water
It is a colourless and odourless gas
It is lighter than air
It burns with a pop sound (flammable)
Safety Precautions
Keep away from naked flame (H₂ is highly flammable)
Handle acids with care
Work in a well-ventilated area
Wear safety goggles and gloves