General Chemistry for Engineers

Lesson: Electrochemistry

Directions: Answer the following problems by showing the complete solution. In return, I will give you a good rating. Thank you so much!

Note: Please be careful with the units and measurements in your calculations. Thank you so much!

Iagnesium bar with a mass of 6.9kg is attached to a buried iron pipe to serve as a sacrificial anode. An average current of 0.027 A flows between the bar and the pipe. a. What half-reaction takes place at the surface of the magnesium bar? (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) b. What half-reaction takes place at the surface of the iron pipe? There is some oxygen around the iron pipe. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) c. In which direction do electrons flow between the two surfaces? from the iron pipe to the magnesium bar from the magnesium bar to the iron pipe d. How many years would it take for the entire magnesium bar to be consumed? years