ELECTROLYSIS
WATER → HYDROGEN + OXYGEN
prostudypk.com
Pass Electricity Through Water
− +
H₂
O₂
Cathode (−)
Anode (+)
water +
a little acid
hydrogen gas
oxygen gas
2 : 1
volume ratio
1. Equation
2H₂O → 2H₂ + O₂
So the volume of H₂ is double that of O₂
2. At the Electrodes
Cathode: 4H⁺ + 4e⁻ → 2H₂
Anode: 4OH⁻ → 2H₂O + O₂ + 4e⁻
3. Gas Test
H₂: 'pops' with a burning splint
O₂: relights a glowing splint
MATRIC CHEMISTRY · ELECTROCHEMISTRY · PUNJAB BOARDS
‹ Labs
↺
❚❚
1×
Next ›