Question

How can we determine the sample that is containing chloride ion where as we are given three samples containing chloride, bromide, and iodide ions seprately???

Answer 1

The simplest method is to add silver nitrate solution to samples solutions:

$I^-+AgNO_3 =>AgI + NO_3^-$ AgI is a yellow precipitate

$Br^-+AgNO_3 =>AgBr + NO_3^-$ AgBr is a yellowish precipitate

$Cl^-+AgNO_3 =>AgCl + NO_3^-$ AgCl is a white precipitate