Double+Displacement+Brock

__**Double Displacement**__
A double displacement reaction is when the ions of two compound exchange places in an aqueous solution to form two new compounds. The equation is set up like this: AB + CD => AD + CB

An example of a double displacement reaction is: aluminum sulfate reacts with barium chloride and forms barium sulfate and aluminum chloride. For this equation we must find out the charges and do the switcheroo, so the equation looks like this: Al2(SO4)3 + BaCl2 => AlCl3 + Ba(SO4)

The problem with this equation is it's not balanced to balance it, we will put a 3 in front of the BaCl2, a 2 in front of the AlCl3, and a 3 in front of the Ba(SO4). The balanced equation turns out like this: Al2(SO4)3 + 2BaCl2 => 2AlCl3 + 3Ba(SO4)

To make positive we have balanced this equation we can make a chart:

__2__ Al __2__ __12__ SO __12__ __3__ Ba __3__ __6__ Cl __6

__