Analytical ChemistryHard
Question
When chlorine water is added to an aqueous solution of potassium halide in the presence of chloroform, a colour is developed but on adding more of chlorine water the colour disappears, and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution.
Options
A.Iodide
B.Bromide
C.Chloride
D.Iodide and bromide
Solution
2I- + Cl2 → I2 (violet) + 2Cl-
5Cl2 (excess) + I2 + 6H2O → 2HIO3 (colourless) + 10HCl
5Cl2 (excess) + I2 + 6H2O → 2HIO3 (colourless) + 10HCl
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