Chlorine is a good bleaching agent because it is able to oxidize substances that are colored to give colorless reaction products. It is used in the paper industry as a bleach, but after it has done its work, residual chlorine must be removed. This is accomplished using sodium thiosulfate, Na2S2O3, which reacts with the chlorine, reducing it to chloride ion. The thiosulfate ion is changed to sulfate ion, SO42-, which is easily removed by washing with water. Write a balanced chemical equation for the reaction of chlorine with thiosulfate ion, assuming an acidic solution.