Iodometry and iodimetry are titration methods that involve the reaction of iodine with an analyte. In iodometry, the analyte is an oxidizing agent that liberates iodine, which is then titrated with a standard thiosulfate solution. In iodimetry, the analyte is a reducing agent that is directly titrated with a standard iodine solution. Starch is commonly used as an indicator for the titrations. Iodometric and iodimetric titrations cannot be performed in strong acidic or basic conditions due to side reactions involving iodine and interference with the indicators. The methods are useful for determining concentrations of substances like vitamin C,