The corrosion rate is to be determined for some divalent metal M in a solution containing hydrogen ions. The following corrosion data are known about the metal and solution: (a) Assuming that activation energy for the corrosion process is 80 kJ/mol, calculate the corrosion rate constant at 25°C. (b) If the corrosion rate constant at 25°C is 2.5 x 10⁻⁴ s⁻¹, calculate the activation energy for the corrosion process.