Wij's solution is a chemical solution that contains an aqueous compound that is used to test and identify chloride (Cl-), bromide (Br-) and iodide (I-) anions. This solution is named after the Belgian scientist named Wij.

Wij's solution is a solution that contains silver ions (Ag+) and nitrate ions (NO3-). When this solution is combined with a sample containing chloride, bromide, or iodide, the silver ions react with them to form silver chloride (AgCl), silver bromide (AgBr), and silver iodide (AgI), each of which has a color. are special

Considering that the color of these compounds is different, this solution can be used to detect and identify the presence or absence of chloride, bromide and iodide anions in different samples. This method is also known as Wedges method or Wedges test and is one of the fast and effective methods for detecting chloride, bromide and iodide anions in chemical laboratories.