In Serpeck's process for purifying white bauxite, the impurity is removed by high-temperature reduct — Metallurgy and Isolation of Elements Chemistry Question
Question
In Serpeck's process for purifying white bauxite, the $SiO_2$ impurity is removed by high-temperature reduction. In the balanced chemical equation for the reduction of one mole of $SiO_2$ by Coke ($C$), what is the stoichiometric coefficient of carbon?
Answer: 2
💡 Solution & Explanation
The reaction for the removal of silica impurity in Serpeck's process is: $SiO_2 + 2C \xrightarrow{1800^\circ C} Si \uparrow + 2CO \uparrow$. Thus, 2 moles of carbon are required per mole of silica.
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