Which element is reduced in the reaction below? Fe(CO)_5 (l) + 2HI (g) rightarro

Question

Which element is reduced in the reaction below? Fe(CO)_5 (l) + 2HI (g) rightarrow Fe(CO)_4 l_2 (s) + CO(g) +?H_2 (g) H Fe I O C The purpose of the salt bridge in an electrochemical cell is to provide a means for electrons to travel from the cathode to the anode maintain electrical neutrality in the half-cells via migration of ions provide a source of ions to react at the anode and cathode provide a means for electrons to travel from the anode to the cathode provide oxygen to facilitate oxidation at the anode Which transformation could take place at the anode of an electrochemical cell? H_2ASO_4 rightarrow H_3ASO_3 O_2 rightarrow H_2O_2 CO_2 rightarrow C_2O_4^2- NO rightarrow NO_3^- VO_2^+ rightarrow VO^2+ Which transformation could take place at the cathode of an electrochemical cell? MnO_2 rightarrow MnO_4^- Br_2 rightarrow BrO_3^- NO rightarrow HNO_2 Mn^2+ rightarrow MnO_4^- HSO_4^- rightarrow H_2SO_3 One of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell, O_2 gas is produced at the cathode oxidation occurs at the cathode electrons flow toward the anode a nonspontaneous reaction is forced to occur an electric current is produced by a chemical reaction

Explanation / Answer

15) (A) H is reduced as its oxidation state changes from +2 in HI to 0 in H2.

16) (B)

19) (D)

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