Question

Question #14d26

Answer 1

`2NaI_(aq) + Cl_2 -> 2NaCl _(aq) + I_2`

Explanation:

In a single replacement reaction, the negative ions `I^-1 and Cl^-` swap places.

Chlorine gas and iodine are diatomic, meaning they are found in nature as `Cl_2` and `I_2`.

Write the skeleton equation:
`NaI + Cl_2 -> NaCl + I_2` (not balanced)

A balanced equation requires the number of atoms of each element to be equal on each side of the equation.

Since there are `2` Chlorine atoms on the left side of the equation, there needs to be a `2` placed in front of the `NaCl` which represents `2` molecules of sodium chloride. This then requires a `2` to be placed in front of the `NaI`.

`2NaI_(aq) + Cl_2 -> 2NaCl _(aq) + I_2`