Single displacement reaction

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Single displacement reaction

It has been suggested that this article or section be merged with Single replacement scheme and Single replacement reaction (Discuss)

A single-displacement reaction is when one element appears to move out of one compound and into another. This is usually written as

A + BX ? AX + B

This will occur if A is more reactive than B. You can refer to the reactivity series to be sure of this.

A and c must either be different metals (hydrogen's behavior as a cation renders it as a metal here), in which case X represents an anion. However, A and B may also be halogens, in which case X represents a cation. In either case, when AX and BX are aqueous compounds (which is usually the case), X is a spectator ion.

Due to the free state nature of A and B, all single displacement reactions are also oxidation-reduction reactions. When A and B are metals, A is always oxidized and B is always reduced. Since halogens prefer to gain electrons, A is reduced (from a 0 to ?1) and B is oxidized (from ?1 to 0) when A and B represent those elements.

A and B may not have the same charge when ions are formed therefore some balancing of the equation may be necessary. For example the reaction between silver nitrate (AgNO₃) and zinc (Zn) forms silver (Ag) and zinc nitrate (Zn(NO₃)₂).

2 AgNO_3(aq) + Zn_(s) ? 2 Ag_(s) + Zn(NO₃)_2(aq)

All simple metal with acid reactions are single displacement reactions. For example the reaction between magnesium (Mg) and hydrochloric acid (HCl) forms magnesium chloride (MgCl₂) and hydrogen (H₂).

Mg_(s) + 2HCl_(aq) ? MgCl_2(aq) + H_2(g)

Metathesis reaction (chemistry)

Metathesis is a bimolecular process involving the exchange of bonds between the two reacting chemical species, which results in the creation of products with similar or identical bonding affiliations.^[1] To illustrate, consider two chemical species, AB and CD, which react to give AD and CB:

AB + CD ? AD + CB

These chemical species can either be ionic or covalent. When referring to precipitation reactions between solutions of ions in inorganic chemistry, it was formerly referred to as double displacement reactions, though this term is now discouraged...

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Single displacement reaction

It has been suggested that this article or section be merged with Single replacement scheme and Single replacement reaction (Discuss)

Metathesis reaction (chemistry)