Assessment Objectives

Detailed Breakdown: Redox

• Define oxidation, reduction, oxidizing agent, and reducing agent.
• Assign oxidation states to atoms in polyatomic ions and neutral molecules (e.g. $\ce{KMnO4}, \ce{Cr2O7^2-}$).
• Construct balanced redox equations in acidic or basic solution using the half-equation method.
• Draw and label a voltaic cell including the direction of electron flow, salt bridge, and half-cell components.
• Predict the products of electrolysis for molten salts and aqueous solutions using selective discharge rules.
• Use the Winkler method to determine the amount of dissolved oxygen in a water sample.
• Calculate the standard cell potential ($E^\theta_{\text{cell}}$) and use it to predict the spontaneity of a reaction.
• Compare the differences between voltaic and electrolytic cells (Charge of electrodes, spontaneity).
• Discuss the factors affecting the mass of an element discharged during electrolysis (Faraday's laws).