Question

What is the current density in an electrochemical cell with a copper electrode and a zinc electrode if the current produced by the cell is 0.5 A and the surface area of the copper electrode is 10 cm² while the surface area of the zinc electrode is 5 cm²?

Answer 1

Current density is defined as the current per unit area. In this case, we will consider the current density at the copper electrode. To calculate the current density, we can use the formula:Current density  J  = Current  I  / Surface area  A Given the current  I  is 0.5 A and the surface area of the copper electrode  A  is 10 cm, we can plug these values into the formula:J = 0.5 A / 10 cmJ = 0.05 A/cmThe current density in the electrochemical cell at the copper electrode is 0.05 A/cm.