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Question

Water is broken down into its constituent elements _________ and __________.


A

Hydrogen

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B

Oxygen

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Solution

Water:

  • Water is a compound that is composed of hydrogen and oxygen atoms.
  • The chemical formula of water is H2O.
  • Water can be broken down into its constituents and elements via the process of electrolysis.

The electrolysis of water is shown below:

  • The chemical reaction taking place at the cathode can be depicted as:

2H2O(l)+2e-H2(g)+2OH-(aq)

  • The chemical reaction taking place at the anode can be depicted as:

2H2O(l)O2(g)+4H+(aq)+4e-

Thus, Water is broken down into its constituent elements Hydrogen and Oxygen.


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