Find the weight percent of Cu in the salt. Should starch indicator be added to this

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chem

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titration att the.....? A 3.026f portion of a copper(II) salt was dissolved in a 250ml volumetric flask. A 50.0ml aliquot was analyzed by adding 1 g of KI and titrating the liberated iodine with 23.33ml of 0.04668M Na2S2O3. Find the weight percent of Cu in the salt. Should starch indicator be added to this titration at the beginning or just before the end point?
 
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