How does iodate produce iodine ion? Because the detection method is to detect iodine ion, and the iodine content of the sample to be detected is iodate, so it is necessary to react iodate to generate iodine ion for detection. Since some unknown components in our sample interfere with the determination of potassium iodate, we intend to use the method of determination of iodide ion. Therefore, it is necessary to change the iodate radical into iodide ion.

How does iodate produce iodine ion? Because the detection method is to detect iodine ion, and the iodine content of the sample to be detected is iodate, so it is necessary to react iodate to generate iodine ion for detection. Since some unknown components in our sample interfere with the determination of potassium iodate, we intend to use the method of determination of iodide ion. Therefore, it is necessary to change the iodate radical into iodide ion.

2IO3-+5HSO3-=3HSO4-+2SO42-+ I2+ H2O, which is directly converted to iodine element. Calculate the iodine element.
Or.2IO3-==Δ==2I-+3O2↑, and then titrate with an oxidant (e.g. FeCl3) to calculate the amount of iodide ion contained 2Fe3++2I-===2Fe2++I2

Does hydrogen ion, iodine ion and nitrate ion together cause redox reaction? Can you write the reaction equation?

Yes, nitrate ions are strongly oxidizable in acid, and iodide ions are reductive
Reaction equation
8H++2NO3-+2I-=I2↓+NO2↑+4H2O