Question

Predict whether a reaction will occur when elemental chlorine and potassium iodide are mixed.

Answer 1

Answer: The reaction do take place and it leads to the formation of potassium chloride and iodine gas.

Explanation:

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

$A+BC\rightarrow AB+C$

Element A is more reactive than element B.

The chemical equation for the reaction of elemental chlorine and potassium iodide follows:

$Cl_2+2KI\rightarrow 2KCl+I_2$

As, chlorine gas is more reactive than iodine. So, it will easily replace iodine from its chemical reaction.

Hence, the reaction do take place and it leads to the formation of potassium chloride and iodine gas.

Answer 2

Yes their will be a reaction what happens is chlorine displaces iodine from its aqueous solution since it is a more powerful oxidizing agent.
C12(aq) + 2KI(aq) = 2KCI(aq) + I2(aq)