We have to determine which elements are being oxidized and reduced when potassium superoxide (KO2) reacts with carbon dioxide (CO2).
We will first write a balanced chemical reaction and then determine the oxidation states to check for oxidation or reduction.
The reaction between KO2 and CO2 produces K2CO3 and O2.
KO2(s) + CO2(g) → K2CO3(s) + O2(g)
Potassium superoxide, KO2, is often used in oxygen masks (such as those used by firefighters) because KO2 reacts with CO2 to release molecular oxygen. Experiments indicate that 2 mol of KO2 (s) react with each mole of CO2(g).
What elements are being oxidized and reduced?