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You are watching: Another name for double replacement reaction

A double-replacement reaction is a reaction in i m sorry the positive and negative ions of 2 ionic compound exchange areas to form two brand-new compounds. The general kind of a double-replacement (also referred to as double-displacement) reaction is:

In this reaction, (ceA) and also (ceC) room positively-charged cations, if (ceB) and also (ceD) space negatively-charged anions. Double-replacement reactions generally occur in between substances in aqueous solution. In order because that a reaction to occur, one of the products is normally a solid precipitate, a gas, or a molecular link such as water.


Formation of a Precipitate

A precipitate creates in a double-replacement reaction once the cations from among the reactants incorporate with the anions from the various other reactant to form an insoluble ionic compound. When aqueous remedies of potassium iodide and also lead (II) nitrate are mixed, the adhering to reaction occurs:

<2 ceKI left( aq ight) + cePb(NO_3)_2 left( aq ight) ightarrow 2 ceKNO_3 left( aq ight) + cePbI_2 left( s ight)>

There are very strong attractive forces that occur in between (cePb^2+) and also (ceI^-) ions and the result is a brilliant yellow precipitate (see number below). The various other product that the reaction, potassium nitrate, remains soluble.

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Both are double replacement reactions. Every formulas are correct and also the equations space balanced.





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