Respuesta :
Double displacement reaction:
A double replacement or displacement reaction, the process in which two compounds react and interchange positive cations and negative anions of two reagents, and created two new forms of compounds or products.
Conditions:
- For this to occur, start with ionic compounds of two in an aqueous solutions (dissolved in [tex]\mathrm{H}_{2} \mathrm{O}[/tex]).
- They should react to create an insoluble precipitates, water or gas.
A feature of this is that two compounds are reagents and two various compounds are products.
Production of insoluble precipitate
[tex]A g N O_{3}(a q)+N a C l(a q) \rightarrow A g C l(s)+N a N O_{3}(a q)[/tex]
Production of an insoluble gas
[tex]N a_{2} S(a q)+2 H C l(a q) \rightarrow 2 N a C l(a q)+H_{2} S(g)[/tex]
Production of water
[tex]H N O_{3}(a q)+K O H(a q) \rightarrow K N O_{3}(a q)+H_{2} O(l)[/tex]
Examples:
An example is the reaction between silver nitrate and sodium chloride. Silver converts a nitrite ion to a sodium chloride ion, and sodium absorbs a nitrate anion.
[tex]A g N O_{3}+N a C l \rightarrow A g C l+N a N O_{3}[/tex]
Also, other example as below
[tex]\mathrm{CuCl}_{2}(a q)+2 A g N O_{3}(a q) \rightarrow C u\left(N O_{3}\right)_{2}(a q)+2 A g C l(s)[/tex]
There are two equivalent ways to maintain a double displacement equation: cation exchange or anion exchange.
