oxidation-reduction reactions

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Last updated 5:14 PM on 5/5/26
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4 Terms

1
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What are the typical oxidation states of the following

  1. Elements

  2. Monoatomic ions

  3. Hydrogen

  4. Oxygen

  1. 0

  2. Usually the charge

  3. +1, unless metal hydrides -1

  4. -2, unless peroxides -1

2
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What is the purpose of a salt bridge in electrolysis?

Maintains electrical neutrality

3
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Describe the electrolysis of aqueous solution of salts (NaCl eg)

The electrodes are immersed in the aqueous solution of sodium chloride

At the cathode, water is reduced to hydrogen gas and hydroxide ions, and Na+ gains an e-

At the anode, water is oxidised to oxygen gas and hydrogen ions, and CL- loses an e-

4
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