Oxidation-reduction reactions Oxidation-reduction reactions (often called redox

Question

Oxidation-reduction reactions Oxidation-reduction reactions (often called redox for shod) are reactions that involve the transfer of electrons from one species to another. Oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers In general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. An oxidizing agent is an element or compound in a redox reaction that oxidizes another species and itself gets reduced and is therefore the electron acceptor ri the reaction. A reducing agent is an element or compound Wi a redox reaction that reduces another species and itself gets oxidized and is therefore the electron donor in the reaction. As a summary, keep in mind the following . Oxidation means an increase in oxidation state and a loss of electrons and involves a reducing agent . Reduction means a decrease in oxidation state and a gain of electrons and involves an oxidizing agent. Part A Which element is oxidized in this reaction? Enter the chemical symbol of the element, Part B This question will be shown after you complete previous question(s). Part C Which element is reduced In this reaction? Enter the chemical symbol of the element. Part D This question will be shown after you complete previous question(s).

Explanation / Answer

Part A

In this reaction Carbon (C) is oxidised from CO To carbon dioxide and Fe is reduced from FeO to Fe.

Part C

In this reaction , Cr is oxidised from +3 oxidation state to +6 and Chlorine is reduced from +1 state to -1 state.

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