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Which of the following is true about a redox reaction?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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In a redox reaction, which of the following statements is correct?
A
All reactants lose electrons.
B
Both species gain electrons.
C
No electrons are transferred between species.
D
One species is oxidized while another is reduced.
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Understand the definition of a redox reaction: it involves the transfer of electrons between two species.
Recall that oxidation is the loss of electrons, and reduction is the gain of electrons.
Recognize that in a redox reaction, one species must lose electrons (oxidized) and another species must gain electrons (reduced).
Evaluate the given statements: 'All reactants lose electrons' is incorrect because not all species lose electrons; some gain them.
'Both species gain electrons' is incorrect because electrons cannot be gained by both; one must lose electrons.
'No electrons are transferred between species' is incorrect because electron transfer is the defining feature of redox reactions.
Therefore, the correct statement is: 'One species is oxidized while another is reduced.'
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