Chemistry Regents Practice Test 2025 – The All-in-One Guide to Exam Success!

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What is a reducing agent?

A substance that accepts electrons

A substance that donates protons

A substance that donates electrons and is oxidized

A reducing agent is a substance that donates electrons in a redox (reduction-oxidation) reaction and, in the process, becomes oxidized itself. This means that the reducing agent facilitates the reduction of another substance by providing electrons to it. The key concept here is the transfer of electrons; when a reducing agent donates electrons, it loses some of its own electrons and thus undergoes oxidation.

In redox reactions, the substance that gains electrons is reduced, while the one that loses electrons is oxidized. This interplay highlights the role of reducing agents in chemical reactions aimed at transferring electrons. Understanding this relationship is essential for grasping the principles of redox chemistry and the behavior of substances in various chemical processes.

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A substance that provides energy to a reaction

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