In regards to Equation 4 in the laboratory procedure, which of the following is the most accurate statement? Select one: During the reaction the oxidation state does not change ... it starts as -1 and ends up as -1. The IO3- is the oxidizing agent. During the reaction it causes the oxidation state of S to increase from +2 to +2.5. The iodate is the reducing agent and the thiosulfate is the oxidizing agent. Converting iodate into iodide requires the addition of five electrons   Equation 4 Attached

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Redox Reactions

Redox reactions are considered to be the chemical reactions involving both oxidation and reduction processes. They are actually oxidation-reduction reactions. The term redox is made from two words where “red” comes from reduction and “ox” comes from oxidation. During a redox reaction electron transfer takes place in such a way that one chemical compound gets reduced and the other one gets oxidized.