DOUBLE+REPLACEMENT


 * DOUBLE DISPLACEMENT REACTIONS:

In a double displacement reaction (ionic reaction) the ions of two compounds exchange places in an aqueous solution to form two new compounds.

AX+BY---→AY+BX

Sentence example: hydrochloric acid reacts with an aqueous solution of sodium hydroxide to yield aqueous sodium chloride and water. (HCl(g)+NaOH(aq)---→NaCl(aq)+ H2O)

You can turn the sentence into an equation by making hydrochloric acid HCl, then make reacts a plus sign. Then you make aqueous solution of sodium hydroxide into NaOH(aq) then you turn yield into an arrow then sodium chloride and water becomes NaCl(aq)+ H2O.

Balancing the equation: _HCl(g)+_NaOH(aq)---→_NaCl(aq)+ _H2O becomes….. 2HCl(g)+2NaOH(aq)---→2NaCl(aq)+ 2H2O**