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The reaction of silicon dioxide (SiO2) with carbon (C) is a classic example of a reduction reaction. It's used to produce elemental silicon (Si), which is a key component in many modern technologies. The balanced chemical equation is:
SiO2 + 2C → Si + 2CO
In this reaction, carbon acts as a reducing agent, removing oxygen from silicon dioxide. The carbon is oxidized to form carbon monoxide (CO).