Question

What observations support the assumption that all of the iodine reacted with the zinc explain?

Answer 1

Answer: It will lead to form a white colored product $ZnI_2$.

Explanation: The reaction of iodine and zinc involves the direct reaction between a metal and a non-metal leading to the synthesis of a metal salt.

$Zn+I_2\overset{H_2O}{\rightarrow}ZnI_2(aq)\overset{\Delta }{\rightarrow}ZnI_2(s)$

During this reaction, heat is released (exothermic reaction) while forming Zinc Iodide($ZnI_2$) which can be easily obtained by evaporating the solvent.

By looking at the stoichiometric coefficients of reactants and products, we observe that whole of the iodine has reacted with zinc.