The sulfur in a 5.00 g sample of steel was evolved as H2S and then collected...

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Chemistry

The sulfur in a 5.00 g sample of steel was evolved asH2S and then collected in a solution of CdCl2to produce the precipitate CdS. The CdS was then titrated withexcess I2 and the remaining I2 was then backtitrated with 4.82 ml of 0.0510 M sodium thiosulfate. If theconcentration of the I2 is 0.0600 M and a total of 10.0ml is added, calculate the %S in the steel.

The relevant reactions are:

CdS + I2 -> S + Cd2+ +2I-

I2 + 2S2O3- ->S2O62- +2I-

Answer & Explanation Solved by verified expert
3.6 Ratings (619 Votes)
Total millimoles of I2 Consumed by CdS Consumed By Hypo sodium thiosulfate CdS I2 S Cd2 2I I2 2S2O3 S2O62 2I    See Answer
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