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CBSE - IX - Chemistry - Structure of the Atom

during the electrolysis of water why there are more bubbles coming out of the hydrogen tube than the oxygen tube though the  number of atoms  and valency of oxygen is more than hydrogen?

Asked by skbl2009 27th April 2016, 8:26 PM
Answered by Expert

Answer:

During electrolysis of water, there are more bubbles coming out of the hydrogen tube than oxygen tube though the number of atoms and valency of oxygen is more than hydrogen, because,
  • The ratio of hydrogen and oxygen atoms in water molecule is 2:1.
  • That means, on breaking of one water molecule by electrolysis, two atoms of hydrogen atoms and one atom of oxygen are released.
  • Thus , hydrogen atoms released are twice the number of oxygen atoms on electrolysis.
  • Hence, more bubbles of hydrogen atoms comes out than oxygen atoms in electrolysis.
Answered by Expert 29th April 2016, 9:08 AM

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