[cs_content][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Production of Materials > 4. Electrochemical Methods >
Account for changes in the oxidation state of species in terms of their loss or gain of electrons[/cs_text][/cs_column][/cs_row][/cs_section][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]
- Oxidation state: A measure of a chemical species’ degree of oxidation.
- Uncombined elements have an oxidation state of zero.
- Simple ions have an oxidation state equal to the charge on the ion.
- During displacement reactions, the oxidation states of the two metal species involved change:
- Metal elements increase their oxidation state, as they lose electrons.
- Metal ions decrease their oxidation state, as they gain electrons.
- The sum of the oxidation states for the elements in a molecule is zero.
- In most compounds:
- Hydrogen has an oxidation state of one.
- Oxygen has an oxidation state of negative two.
- Oxidation states can be used to describe electron transfer in oxidation-reduction reactions:
- Oxidation involves an increase in oxidation state.
- Reduction involves a decrease in oxidation state.
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