In the chemical reaction you described, where substance A transfers electrons to substance B, the correct statement is:
Substance A is oxidized and acts as the reducing agent.
Here's the reasoning:
- Oxidation refers to the loss of electrons. Since substance A is losing electrons (transferring them to substance B), it is being oxidized.
- A reducing agent is a substance that donates electrons to another substance, thus causing the other substance to be reduced. Since substance A is giving away its electrons, it is acting as the reducing agent.
- On the other hand, substance B is receiving the electrons, which means it is being reduced and acts as the oxidizing agent.
So the more accurate assessment of the roles would be:
- Substance A: Oxidized and acting as the reducing agent.
- Substance B: Reduced and acting as the oxidizing agent.
Thus, the option that correctly describes substance A in the context of this reaction is that it is oxidized and acts as the reducing agent.