Silicon is produced for the chemical and electronics industries by the following reactions. Give the balanced equation for each reaction.
a. SiO2(s) + C(s) → Si(s) + CO(g)
b. Silicon tetrachloride is reacted with very pure mag-nesium, producing silicon and magnesium chloride.
c. Na2SiF6(s) + Na(s) → Si(s) + NaF(s)