A 0.1358-g portion of potassium iodate (MW 214.00), about 2 g ofpotassium
iodide, and 2 mL of 6 M hydrochloric acid were dissolved in 25 mLof distilled
water. The triiodide formed during the ensuring reaction wastitrated to the
starch end point with 31.94 mL of a thiosulfate solution. A25.00-mL triiodide
sample solution was titrated to the end point with 21.33 mL of thestandardized
thiosulfate solution. Calculate the concentrations of thethiosulfate solution and
the triiodide solution.
