A standard iodate solution is prepared at 22.0 °C by dissolving0.9123 g (uncorrected mass) of KIO3 with deionized water in a499.92 mL volumetric flask. To standardize the Na2S2O3 solution, a10.005 mL aliquot of the KIO3 solution is acidified, treated withexcess KI, and titrated with Na2S2O3, requiring 22.05 mL to reachthe end point. Finally, a 10.005 mL aliquot of unknown Cu solutionis reduced with excess KI. The liberated iodine requires 31.46 mLof Na2S2O3 solution to reach the end point. Calculate the unknownCu concentration in g/L.
These are what the correct step answers should be, just needto show how to do work:
[KIO3 standard (corrected to 20 °C): 8.53255mM]
[S2O3 2− titrant: 23.2294 mM]
FINAL ANSWER: [Unknown: 4.64160 g/LCu]
