What is a redox reaction?
REDOX Review

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Science
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A redox reaction is a chemical reaction that involves the transfer of electrons between two species, resulting in changes in oxidation states.
2.
FLASHCARD QUESTION
Front
Define oxidation in terms of electron transfer.
Back
Oxidation is the process in which an atom, ion, or molecule loses electrons.
3.
FLASHCARD QUESTION
Front
Define reduction in terms of electron transfer.
Back
Reduction is the process in which an atom, ion, or molecule gains electrons.
4.
FLASHCARD QUESTION
Front
What is an oxidation number?
Back
An oxidation number is a value assigned to an element in a compound that represents the number of electrons lost or gained by that element.
5.
FLASHCARD QUESTION
Front
What does it mean for a substance to be oxidized?
Back
A substance is oxidized when it loses electrons and its oxidation state increases.
6.
FLASHCARD QUESTION
Front
What does it mean for a substance to be reduced?
Back
A substance is reduced when it gains electrons and its oxidation state decreases.
7.
FLASHCARD QUESTION
Front
In the reaction 2Ca + O2 -> 2CaO, what happens to calcium?
Back
Calcium is oxidized as it loses electrons to form CaO.
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