Question

4. Pure silicon can be prepared by heating silicon dioxide (sand) with carbon at high temperatures, also releasing carbon dioxide gas. Balance this chemical equation. ​

Answer 1

The balanced chemical equation provided for producing pure silicon by heating silicon dioxide with carbon is already balanced and correct as: SiO₂ (s) + 2C(s) → Si(s) + 2CO(g).

Step-by-step explanation:

The question pertains to balancing a chemical equation for the process where pure silicon is prepared by heating silicon dioxide with carbon at high temperatures. The correct balanced equation for this process should reflect the law of conservation of mass, meaning each element should have the same number of atoms on both sides of the equation. When we balance the given equation SiO₂ (s) + 2C(s) → Si(s) + 2CO(g), it is already balanced as written. In this reaction, one mole of silicon dioxide reacts with two moles of carbon to produce one mole of silicon and two moles of carbon dioxide gas.