A. I2O4
B. I4O2
C. I2O5
D. All are equally useful
¨ Iodine pentoxide (I2O5) is used for the quantitative analysis of carbon monoxide (CO) because it reacts with CO to form carbon dioxide (CO2) and iodine (I2). The reaction is as follows:
¨ I2O5 + 5 CO → 5 CO2 + I2
¨ The liberated iodine can be titrated with a standard solution of sodium thiosulfate (Na2S2O3) to determine the amount of CO present in the sample. Therefore, I2O5 is an important reagent in the determination of trace amounts of CO in industrial and environmental samples.
Submitted by :- Jamil Ahmed