This page provides exercise in writing redox equations from descriptions of the process. Enter the compounds in the sequence: OA + RA => RA + OA (OA = oxidizing agent, RA = reducing agent) For this drill to work, enter the sign of charged species first, then the magnitude as in Fe+3 (and not Fe3+). If it is singly charged, leave off the "1" (Na+) Do not be concerned with balancing or stoichiometry.