A 30.00-L air sample was passed through an absorption tower containing a solution of Cd²⁺, where H₂S was retained as CdS. The mixture was acidified and treated with 10.00 mL of 0.0100 M I₂. After the reaction

was complete, the excess iodine was titrated with 13.32 mL of 0.01358 M thiosulfate. Calculate the concentration of H₂S in ppm; use 1.20 g/L for the density of the gas stream.

Transcribed Image Text:

S²+1₂S(s) + 21¯