Question

Chlorine gas was bubbled through a solution of potassium iodide in boiling tube.

1. State the observation made.
2. Name the oxidizing agent in this reaction. Explain. 

Answer 1

1. Yellow colour of chlorine turns to colourless and a black solid is formed at the  bottom of the    solution.
2.     
   • 2KI _(aq)  +  Cl_2(g)  →  2KCl_(aq) +  I_2(g)
   • Chlorine is the oxidizing agent  because its oxidation number changes form 0 to -1