Electrochemistry

Electrolysis of water


Electrolysis of water is the decomposition of water (H2O) into the gases oxygen (O2) and hydrogen (H2) by means of a direct electric current. To reduce the resistance to the passage of current through water, it is usually acidified by adding a small amount of sulfuric acid or by adding a strong electrolyte such as sodium hydroxide, NaOH.
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Electroplating


Electroplating is an electrochemical treatment consisting of coating a metal surface with cations of another metal contained in an aqueous solution.
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Standard reduction potential


The standard reduction potential is the potential of the electrode with respect to the standard hydrogen electrode. The more positive (+) the standard reduction potential, the easier it is to accept electrons than hydrogen ions. Check in the simulation what happens when the electrodes are changed.
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Polar and non-polar molecules


A polar molecule is a molecule with a non-uniform distribution of electric charge, resulting in it having a plus and a minus end, e.g. water. A non-polar molecule is a molecule with a uniform distribution of electric charge, resulting in it not reacting in the presence of electric fields, e.g. an oil.
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Molecule polarity


When is a molecule polar? Change the electronegativity of the atoms in a molecule to see how it affects polarity. See how the molecule behaves in an electric field. Change the bond angle to see how it affects the polarity shape.

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