Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction that involves the transfer of electrons between two species, resulting in changes in oxidation states.

Front

What does oxidation mean in a redox reaction?

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Oxidation is the process in which an atom, ion, or molecule loses electrons, resulting in an increase in oxidation state.

Front

What does reduction mean in a redox reaction?

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Reduction is the process in which an atom, ion, or molecule gains electrons, resulting in a decrease in oxidation state.

Front

What is the oxidation number of an element?

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The oxidation number is a value assigned to an element in a compound that represents the number of electrons lost or gained by that element.

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How do you determine the oxidation number of an element in a compound?

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To determine the oxidation number, follow rules such as the oxidation number of an element in its elemental form is 0, and the sum of oxidation numbers in a neutral compound is 0.

Front

What is the oxidation number of oxygen in most compounds?

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The oxidation number of oxygen is usually -2 in most compounds, except in peroxides where it is -1.

Front

What is the oxidation number of hydrogen in most compounds?

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The oxidation number of hydrogen is usually +1 when bonded to nonmetals and -1 when bonded to metals.

Front

Identify the oxidizing agent in a redox reaction.

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The oxidizing agent is the substance that gains electrons and is reduced in the reaction.

Front

Identify the reducing agent in a redox reaction.

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The reducing agent is the substance that loses electrons and is oxidized in the reaction.

Front

What is the role of electrons in redox reactions?

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Electrons are transferred from the reducing agent to the oxidizing agent, facilitating the oxidation and reduction processes.