Question

what is diuble decomposition reaction​

Answer 1

Answer:

A salt metathesis reaction, sometimes called a double replacement reaction, double displacement reaction, is a chemical process involving the exchange of bonds between two non-reacting chemical species which results in the creation of products with similar or identical bonding affiliations

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Answer 2

$\underline{\underline{\large{\bf{\red{\;Double\:displacement\:reactions}}}}}$

Definition

• Those reactions in which two compounds (reactants) react by the Exchange of ions forming two new compounds (products), are called Double displacement Reactions.

Example (1)

• When Silver nitrate (AgNO₃) react with Sodium chloride (NaCl) solution, then a white precipitate of Silver chloride (AgCl) along with Sodium nitrate (NaNO₃) is formed.

$\star\;\;\boxed{\red{\sf{AgNO_{3(aq)} +NaCl_{(aq)}\longrightarrow AgCl_{(s)}+NaNO_{3(aq)}}}}$

Example (2)

• When Barium chloride (BaCl₂) react with Sodium sulphate (NaSO₄) then a white colored precipitate of Barium sulphate (BaSO₄) is formed with Sodium chloride (NaCl) solution.

$\star\;\;\boxed{\red{\sf{BaCl_{2(aq)} +Na_2 SO_{4(aq)}\longrightarrow BaSO_{4(s)}+NaCl_{(aq)}}}}$

• A double displacement usually occurs in solution and one of the products being insoluble, called precipitate is separated out.

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Some other types of Chemical reactions :

Combination reaction

• Reactions in which two or more reactants combine to form a single product, are known as Combination reactions.

• Example: when Magnesium (Mg) and oxygen (O₂) are combined and heated , then magnesium oxide (MgO) is formed.

$\star\boxed{\sf{\red{2\;Mg_{(s)}+O_{2(g)} \xrightarrow{\;\;\;\Delta\;\;\;} 2\;MgO_{(s)}}}}$

Decomposition reaction

• Reactions in which a single compound form two or more simpler substances due to the action of energy like heat, light, electricity.,etc, are known as Decomposition reactions.

• Example: When Calcium carbonate (CaCO₃) is heated it decomposes to form Calcium oxide (CaO) and Carbon dioxide (CO₂).

$\star\boxed{\sf{\red{CaCO_{3(s)}\xrightarrow{\;\;\;\Delta\;\;\;} CaO_{(s)}+CO_{2(g)}}}}$

Displacement reaction

• Reactions in which a more reactive element replaces less reactive element from the compound, then the reaction is known as Displacement reaction.

• Example: When copper sulphate (CuSO₄) reacts with Iron (Fe) then, more reactive metal Iron displaces copper from Copper sulphate to form Ferrous sulphate (FeSO₄) and Copper (Cu).

$\star\boxed{\sf{\red{CuSO_{4(aq)}+Fe_{(s)}\longrightarrow FeSO_{4(aq)}+Cu_{(s)}}}}$