You make your potassium dichromate solution and titrate it with ferrous ammonium sulfate, hexahydrate made by dissolving 0.5274 g in 200 ml of di water. you pipette 50 ml and perform 4 titrations and record the following ml of potassium dichromate to titrate to a purple endpoint: 32.17, 31.89, 32.02, 31.88 ml. you then weight out 4 iron samples: 0.4063, 0.4089, 0.4153, 0.4202 g and titrate with the potassium dichromate solution to a purple endpoint using the following ml: 23.17, 23.86, 24.09, 28.55 ml. perform all necessary calculations and report the average molarity of the standard, sd, and rsd. also, report the %fe, sd, and rsd.