A standard iodate solution is prepared at 22 0 C by dissolving0 9123 g...

A standard iodate solution is prepared at 22.0 Â°C by dissolving 0.9123 g (uncorrected mass) of...

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Chemistry

A standard iodate solution is prepared at 22.0 Â°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 Â°C): 8.53255mM]
[S2O3 2âˆ’ titrant: 23.2294 mM]
FINAL ANSWER: [Unknown: 4.64160 g/LCu]

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3.9 Ratings (410 Votes)

KIO3 Volume 49992 ml Mass 09123 g Molar mass of KIO3 214 gmol Concentration of KIO3 mass1000molar massvolume 09123100021449992 000852753 M 852753 mM at 22 oC Concentration of KIO3 852753 mM at 22 oC When Na2S2O3 is titrated See Answer

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