Chapter 18, Problem 98AP

. In each of the following reactions, identify which element is oxidized and which is reduced by assigning oxidation states.

a. ${\text{2Br}}_{\text{2}}{\text{O}}_{\text{3}}\left(s\right)+{\text{6Cl}}_{\text{2}}\left(g\right)\to 4{\text{BCl}}_3\left(l\right)+{\text{3O}}_{\text{2}}\left(g\right)$   b. ${\text{GeH}}_{\text{4}}\left(\text{g}\right)+{\text{O}}_2\left(\text{g}\right)\to \text{Ge}\left(\text{s}\right)+{\text{2H}}_{\text{2}}\text{O}\left(\text{g}\right)$   c. ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\left(\text{g}\right)+{\text{Cl}}_{\text{2}}\left(\text{g}\right)\to {\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{Cl}}_{\text{2}}\left(\text{l}\right)$   d. ${\text{O}}_{\text{2}}\left(\text{g}\right)+{\text{2F}}_{\text{2}}\left(\text{g}\right)\to {\text{2OF}}_{\text{2}}\left(\text{g}\right)$