What is the oxidation state of sulfur in potassium peroxydisulfate, a powerful oxidizing agent used in analytical chemistry?

💡 Solution & Explanation

In potassium peroxydisulfate, the compound contains a peroxide linkage with oxygen in minus one oxidation state and regular oxygen atoms in minus two oxidation state, coupled with potassium ions in plus one oxidation state. Balancing the total oxidation numbers to zero for the formula yields plus six for each sulfur atom. Determining oxidation numbers requires accounting for covalent bonds and electronegativity differences. Redox titrations rely on accurate electron transfer calculations.