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=__DOUBLE DISPLACEMENT__=

Definition: Double Displacement is when the positive ion of one compound will replace the positive ion of another compound to produce two new compounds. Equation: AB + XY => AY + XB

Example: Silver Nitrate reacts with Hydrogen Chloride to produce Silver Chloride and Hydrogen Nitrate Ag(NO3) + HCl → AgCl + H(NO3)

The Silver from the first compound is displacing the Hydrogen in from the second compound, while this is happening the Hydrogen is taking the place of the Silver from the first compound. This could just as easily be viewed as the NO3 in the first compound and the Cl in the second compound displacing one another.

There are four steps needed to take to change the chemical sentence into a formula: 1.Change the chemical names into symbols. 2.Find the charge of each element. 3.Make the "switcheroo." 4.If it is possible to reduce, do it.

To balance the equation, make a table under it and mark how many atoms of each element to find the lowest number that they both go in to. To change it to make the elements equal, only change the coefficients and nothing else.

Example: Silver Nitrate reacts with Sodium Chloride to produce Silver Chloride and Sodium Nitrate.

Nitrate is polyatomic = (NO3)

1.Ag (NO3) + NaCl 2.Ag1(NO3)-1+Na1Cl-1 (adding the charges.) 3.Ag(NO3)+NaCl--->AgCl+Na( NO3)...Charges stay the same because they are the same elements. 4.Balanced and Complete