a) A 3.071-g portion of a copper(II) salt was dissolved in a 250-mL volumetric flask. A...
a) A 3.071-g portion of a copper(II) salt was dissolved in a 250-mL volumetric flask. A 50.0-mL aliquot was analyzed by adding 1 g of KI and titrating the liberated iodine with 23.80 mL of 0.04684 M Na2S2O3. Find the weight percent of Cu in the salt.
b) Should starch indicator be added to this titration at the beginning or just before the end point?
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