2. When electricity is passed through water, bubbles of
oxygen and hydrogen are respectively released at
electrodes connected to _____ and _______ terminals
of a cell. [please explain the answer]
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When electric current is passed through water , it decomposes to give hydrogen gas and oxygen gas.
ELECTRICITY
2H₂O(I) ---------------------------- > 2H₂(g) + O₂(g)
Water splits up into H+ ions and OH- ions .
Positive H+ ions will move towards the negative terminal that is cathode and OH- ions will move towards anode.
At cathode :
H+ ions will gain electrons and form Hydrogen gas
2H⁺ +2e--->H2 (g)
At anode : Oxygen gas will be released
4 OH⁻(aq)→O2(g) + 2 H2O(l) + 4 e−
ELECTRICITY
2H₂O(I) ---------------------------- > 2H₂(g) + O₂(g)
Water splits up into H+ ions and OH- ions .
Positive H+ ions will move towards the negative terminal that is cathode and OH- ions will move towards anode.
At cathode :
H+ ions will gain electrons and form Hydrogen gas
2H⁺ +2e--->H2 (g)
At anode : Oxygen gas will be released
4 OH⁻(aq)→O2(g) + 2 H2O(l) + 4 e−
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tulsiloungani:
can u tell me what is cathode and what is anode I don't know
the negatively charged electrode by which electrons enter an electrical device is called cathode and
the positively charged electrode by which the electrons leave an electrical device is called anode
thank you
Answered by
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positive and negative terminals
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