Recall the mnemonic for redox reactions:
Loss Electrons → Oxidation → Reducing Agent
Gain Electrons → Reduction → Oxidizing Agent
This means the element that gains electrons/reduced is the oxidizing agent while the element that loses electrons/oxidized is the reducing agent.
Determine if the following is an oxidation–reduction reaction, and identify the oxidizing agent, the reducing agent, the substance being oxidized, and the substance being reduced:
SiCl4 (l) + 2 Mg (s) → 2 MgCl2 (s) + Si (s)
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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.