Question

Two reagent bottle a and b containing solution of potassium chloride and potassium iodide respectively have lose their labeling. Devise a chemical test to identify the solution

Answer 1

Explanation:

When chlorine (Cl2) gas is passed through an aqueous solution of potassium iodide (KI), the products formed are solid iodine (I2) and potassium chloride (KCl). This is a displacement reaction in which the less reactive iodine in potassium iodide is displaced by the more reactive chlorine. The equation can be written as:

2KI(aq)+Cl2(g)→2KCl(aq)+I2(s)