Question

11. The diagram below shows a sacrificial anode protecting an iron pipeline. (6) Moist soil 2H2O Soil anions (-) Mg2+ soil cations Mg2+ Mg Fe 2H2O Pipeline (cathode) Sacrificial Anode The magnesium rod (sacrificial anode) will protect the steel pipeline from corrosion. Magnesium is more easily oxidized than iron, therefore acting as an anode in a Galvanic cell. The steel pipeline becomes the cathode and oxygen is reduced, in turn protecting the steel pipeline. a. Write the balanced half-reaction that is happening at the anode (represented by the blue arrow). b. Write the balanced half-reaction that is happening at the cathode (represented by the red arrow).

          11. The diagram below shows a sacrificial anode protecting an iron pipeline. (6)
Moist soil
2H2O
Soil anions (-) Mg2+ soil cations
Mg2+
Mg
Fe
2H2O Pipeline (cathode)
Sacrificial Anode
The magnesium rod (sacrificial anode) will protect the steel pipeline from corrosion. Magnesium is more easily oxidized than iron, therefore acting as an anode in a Galvanic cell.
The steel pipeline becomes the cathode and oxygen is reduced, in turn protecting the steel pipeline.

a. Write the balanced half-reaction that is happening at the anode (represented by the blue arrow).
b. Write the balanced half-reaction that is happening at the cathode (represented by the red arrow).

11 the diagram below shows a sacrificial anode protecting an iron pipeline 6 moist soil 2h0 soilanions mg soll catlons mg mg fe 2h0 pipeline cathode sacrificial anode the mangnesium rod sac 47555

Added by Carl D.

Question

Please give Ace some feedback