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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

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Related Questions

What is the difference between thermal dissociation and thermal decomposition?

Thermal decomposition is the process of decay enacted upon a molecule due to naturally occurring environmental conditions. Thermal dissociation is the breaking apart of a molecule's bonds due to the introduction of heat.


How the dissociation of food?

You think probable to thermal decomposition of foods by heating.


What is the difference between dissociation and dissolution?

Dissociation refers to the separation of components or elements, while dissolution refers to the breaking down or dispersal of a substance into smaller parts.


What does the word dissociate mean?

1. Dissociation: formation of ions of an ionic compound in a water solution. 2. Thermal dissociation: thermal decomposition of a substance.


What is compound dissociation?

Compound dissociation refers to the breaking apart of a compound into its individual elements or simpler compounds. This process typically involves the application of energy, such as heat or light, to break the chemical bonds holding the compound together. An example is the decomposition of water (H2O) into hydrogen gas (H2) and oxygen gas (O2) through the use of electrolysis.


What is electrolytic decomposition reaction?

a chemical decomposition reaction produced by passing an electric current through a solution containing ions is known as electrolytic decomposition reaction


How does heat and electricity split chemicals up?

1. thermal dissociation (decomposition)2. electrolysis


What is the difference between the processes of dissolution and dissociation?

Dissolution is the process where a solid substance dissolves in a liquid to form a solution, while dissociation is the process where a compound breaks apart into its individual ions in a solution.


What is the difference between dissociation and dissolving in terms of their effects on a substance's chemical structure?

Dissociation involves breaking apart into ions, while dissolving involves mixing with a solvent without changing the chemical structure.


What makes an acid stronger than the other?

The difference is between dissociation constants. A high value has the meaning of strong acid.


What is the difference between homolytic and heterolytic bond dissociation energy?

Homolytic bond dissociation energy is when a covalent bond breaks evenly, with each atom keeping one electron. Heterolytic bond dissociation energy is when a covalent bond breaks unevenly, with one atom keeping both electrons.


What is the difference between solubility and dissociation in terms of how a substance interacts with a solvent?

Solubility refers to the ability of a substance to dissolve in a solvent, while dissociation refers to the breaking apart of a compound into its individual ions when it is dissolved in a solvent. Solubility is about how much of a substance can dissolve in a solvent, while dissociation is about how the substance behaves once it is dissolved.