NAME THE GAS WHICH IS EVOLVED AT ANODE AND CATHODE ON ELECTOROLYSIS OF WATER.WHAT IS THE RATIO OF GAS AND WHY
NAME THE GAS WHICH IS EVOLVED AT ANODE AND CATHODE ON ELECTOROLYSIS OF WATER.WHAT IS THE RATIO OF GAS AND WHY
Dear Student,
Decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) by passing an electric current through the water is called Electrolysis of water.
Hydrogen will appear at the cathode (the negatively charged electrode, where electrons enter the water), and oxygen will appear at the anode (the positively charged electrode).
Water is oxidized at the anode. The reaction is:
2H2O ---> O2 + 4H+ + 4e-
Water is reduced at the cathode. The reaction is:
4H2O + 4e- ---> 2H2 + 4OH-
In the decomposition reaction, the amount of hydrogen generated is twice the number of moles of oxygen (volumes of the two gases are observed in a ratio of 2:1, H2:O2). This of course is due to the ratio of H to O atoms in H2O.
The over all reaction is:
2H2O ---> 2H2 + O2
Regards
Dear Student,
Decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) by passing an electric current through the water is called Electrolysis of water.
Hydrogen will appear at the cathode (the negatively charged electrode, where electrons enter the water), and oxygen will appear at the anode (the positively charged electrode).
Water is oxidized at the anode. The reaction is:
2H2O ---> O2 + 4H+ + 4e-
Water is reduced at the cathode. The reaction is:
4H2O + 4e- ---> 2H2 + 4OH-
In the decomposition reaction, the amount of hydrogen generated is twice the number of moles of oxygen (volumes of the two gases are observed in a ratio of 2:1, H2:O2). This of course is due to the ratio of H to O atoms in H2O.
The over all reaction is:
2H2O ---> 2H2 + O2
Regards
