What is the difference between dissociation and decomposition?

Answer 1

Dissociation is when a compound breaks apart into its component ions, usually as it dissolves in water. Dissociation is considered a physical change as the substance that dissociates retains its chemical identity, and can be fairly easily restored to its original state.

Examples of dissociation: NaCl --> Na+ + Cl- or HNO3 --> H+ + NO3-

Decomposition is when a substance breaks down into to or more different substances. This is considered a chemical change because the substance that breaks down loses its chemical identity it is usually not reversible. Examples: (NH4)2Cr2O7 --> N2 + 4H2O + Cr2O3 or 2H2O2 --> 2H2O + O2

Answer 2

Single Displacement (or single replacement) reactions involve a compound and an element in both the products and the reactants.

For example, Zn + 2HCl --> ZnCl2 + H2 ;

2AgNO3(aq) + Cu --> Cu(NO3)2(aq) + 2Ag(s)

Each side has one element and one compound.

Double Displacement (or double replacement) reactions involve compounds on both sides, and the cations are switched in the products.

For example, Fe2O3 + HCl --> FeCl3 + H2O ;

Na2SO4(aq) + BaCl2(aq) --> BaSO4(s) + 2NaCl(aq)

Answer 3

According to me decomposition reaction in which a chemical breaks into its simpler forms and double displacement means reaction between a salt and acid or two salts. Can any one make it more clear ?In some books reaction between a salt and an acid is also given as decomposition reaction.

Answer 4

a normal displacement reaction is where a more reactive metal takes a substance out of its solution.

Zn + H2SO4 → ZnSO4+ H2

if its a double decomposition reaction, both reactants take a chemical and form two completely different 'swapped' compounds.

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

its just as a single rupee and a double rupee

Answer 5

There are single replacement and double displacement reactions.

In a single displacement reaction a pure element replaces another, usually less reactive, element in a compound, forcing that element into its elemental state. In these reactions oxidation states change.

Examples: 2Na(s) + 2H2O(l) --> 2NaOH(aq) + H2(g), Cu(s) + 2AgNO3(aq) --> 2Ag(s) + Cu(NO3)2(aq)

In a double displacement reaction two elements switch places in compounds. Usually these reactions are precipitation or acid-base reactions. In a double displacement reaction oxidation states remain the same.

Examples: HCl(aq) + NaOH(aq) --> H2O(l) + NaCl(aq),

Pb(NO3)2(aq) + 2KBr(aq) --> PbBr2(s) + 2KNO3(aq)

Answer 6

Dissociation refers to a reversible process where a compound breaks into its constituent parts (ions or molecules), usually in a solution. Decomposition involves the breakdown of a compound into simpler substances, which may or may not be reversible, often due to heat, light, or chemical reactions. Dissociation specifically involves breaking the compound into its components, while decomposition generally results in the compound transforming into different substances.

Answer 7

Dissociation in chemistry is the process of splitting of an ionic compound in water solution.

Decomposition in chemistry is the process of fragmentation of a compound in smaller parts.

Answer 8

no. they are not same