Question #14d26

1 Answer
marfre
Mar 2, 2017

#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#

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