Double-+Displacement


 * __Double –Displacement__**

Is when the ions of two compounds exchange places in an aqueous solution to form two new compounds.

An example of a double- displacement equation could be: Potassium Iodide and lead nitrate react to produce lead iodide and potassium nitrate

For here we must change the modern names of each chemical to their chemical symbols: We can do this by comparing their names to their symbols n the periodic table: We find: Potassium=K Iodide=I Lead=Pb Nitrate=NO3

So this equation becomes: KI(aq)+Pb(NO3)2(aq) à PbI2(s)+K(NO3)(aq) This equation is not balanced yet though. 1 K 1 1 Pb 1 2 (NO3) 1 1 I 2

Balanced it is: 2KI(aq)+Pb(NO3)2(aq) à PbI2(s)+2KNO3(aq) 2 K 2 2 I 2 1 Pb 1 2 NO3 2

SWEEEEET!!



by jess and amanda