Sulfide in a water sample is coulometrically titrated with iodine (H2S + I2 ----> S +...

4.2 Ratings (686 Votes)

Â Â Â Â Â Â Â Â Â Â Â Â (H2S + I2 ----> S + 2H+ + 2I-).

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â S^-2 + 2e^- -------> S

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Z =2

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â FÂ Â = 96500C

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â MÂ Â = 34g/mole

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â tÂ Â Â Â Â = 5.4minutes = 5.4*60Â Â = 324sec

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â WÂ Â = MCt/ZF

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 34*0.75*324/2*96500Â Â = 0.043g

molarity = W*1000/G.M.Wt * volume of solution in ml

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 0.043*1000/34*10Â Â Â = 0.1259M

molarity of sulfide is 0.1259M

(B) 0.1259

Â Â Â Â Â Â Â Â Â Â Â Â Â WÂ Â Â Â = M

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