what is double displacement reaction?

Answer 1

Double Displacement Reactions

Our next type of reaction involves two replacements so they are called double replacement or double displacement reactions.

AgNO3 + HCl = AgCl + HNO3

In this equation the silver from the first compound displaces the hydrogen in the second compound, while at the same time that hydrogen is taking the place of the silver in the first compound. This could just as easily be viewed as the NO3 in the first compound and the Cl in the second compound displacing one another. So make note that what is being displaced need not be a simple element.

In the next equation you should be able to see that the iron and hydrogen trade places, or the oxygen and chlorine trade places.

Fe2O3 + HCl = FeCl3 + H2O

Again, these equations are not balanced so please take a moment to do that.


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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.

Types of reaction

[edit] Neutralization

A neutralization reaction is a specific type of double displacement reaction. Neutralization occurs when equal amounts of acid react with equal amounts of a base. A neutralization reaction creates a solution of salt and water, for example:

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

[edit] Aqueous metathesis

Metathesis reactions can occur between two inorganic salts when one product is insoluble in water, driving the reaction forward, as in the following examples:

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq)

One of the compounds formed is usually a precipitate, an insoluble gas that bubbles out of the solution or an insoluble solid, or a molecular compound, usually water. Since one of these conditions must always be met, a solubility chart (or general knowledge of solubility rules) can be used in advance to predict whether two aqueous reactants will react or not. HSAB theory can also be applied as a means of determining or prediction of products created from such a metathesis reaction.

[edit] Acid and carbonates

Another subcategory of this reaction type features acids reacting with carbonates/bicarbonates. These reactions always yield carbonic acid as a product, which in turn automatically decomposes into carbon dioxide and water. An example below is the common science fair "volcano" reaction - acetic acid with sodium bicarbonate:

CH3COOH (aq) + NaHCO3(s) → CH3COONa(aq) + CO2(g) + H2O(l)

[edit] Olefin metathesis

Main article: olefin metathesis

An example of metathesis reaction involving the redistribution of alkenes fractions, referred to as olefins within a metathesis reaction of this type.
An example of metathesis reaction involving the redistribution of alkenes fractions, referred to as olefins within a metathesis reaction of this type.

An important and influential reaction within organic chemistry, which involves the principle of metathesis is the olefin metathesis reaction developed by Yves Chauvin, Richard R. Schrock and Robert H. Grubbs, who shared a Nobel Prize in Chemistry in 2005.

The principle of olefin metathesis is that an alkene double bond is cleaved and redistributed alongside the redistribution of an alkylidene under the presence of catalytic metals, such as nickel or tungsten. It has several commercially significant applications, and it is especially useful due to the relatively small amounts of side products and hazardous waste products.

Answer 2

Define Double Displacement Reaction

Answer 3

Define Double Replacement Reaction

Answer 4

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RE:
what is double displacement reaction?

Answer 5

A double displacement reaction is when both the compounds on the right of the arrow mark have exchanged their negative part with negative part of the other reactant

Answer 6

Two different atoms or groups of atoms [ions] are exchanged in double displacement reactions.

Answer 7

NaCl+AgNO ------> AgCl |+Nano3
Here two compounds of sodiumchloride and silver nitrate exchange ions to form two new compounds namely silver chloride and sodium nitrate.This type of reactions is called as double displacement reaction.....

Answer 8

it's when the 2 compounds exchange their positive ions.
that is what double displacement is.

Answer 9

a reaction where compounds exchange their radicals to form new compounds
AB+CD ---> AD + CB
[vs. a simple displacement reaction of the form AB + C ---> AC+B]

Answer 10

a double displacement reaction is the one in which the positive radical of the first compound reacts with the negative radical of the second one...and the negative radical of the first one reacts with the positive radical of the second one...
eg....
NaCl+BaNO3-----BaCl2+NaNO3