Difference Between Compound And Mixture

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t-nez | High School Teacher | (Level 3) Associate Educator

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If you're trying to find a way to remember how to tell compounds from mixtures, just remember that compounds don't have variable composition and mixtures do. For example, water is always composed of two hydrogen atoms and one oxygen atom per molecule. Every particle of water in a sample is identical. Compounds are made of identical molecules. Mixtures, on the other hand, are made of more than one type of particle mixed together so the composition can vary. Rubbing alcohol can be obtained as 70% isopropanol/30% water and as 90% isopropanol/10% water. Any proportion of water and alcohol is possible as they completely dissolve in all proportions. Salts have limited solubility in water, but their proportions can still vary. An an example, the salinity of ocean water varies by location.

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freemihai | College Teacher | (Level 2) Adjunct Educator

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There exists several characteristics that make the difference between a mixture and a compound.

A mixture can contain components in any proportions while a compound contains components in fixed proportions.

All components in a mixture do not chemically react, while the components in a compound do react and their original properties are lost.

The separation of a mixture in its components is made by physical means while the separation of a compound in its components is possible only by chemical means.

There exists chemical reactions when a compound is formed while in the formation of a mixture chemical reactions are not involved.

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Chantelm | Student, Grade 10 | (Level 1) Salutatorian

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A mixture is a blend of 2 or more substances each of which retain their own identity, for example: air, koolaid, and lemonade. A compound is a substance made of 2 or more elements and is chemically combined, for example: salt,water and carbon dioxide

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parama9000 | Student, Grade 11 | (Level 1) Valedictorian

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Mixture is composed of molecules of different types.

A compound can only be separated through chemical means.

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Yojana_Thapa | Student, Grade 10 | (Level 1) Valedictorian

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Mixture is a blend of two or more substance , each of which retains its identity. A compound is a substance made up of two or more elements which are chemically combined.

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revolution | College Teacher | (Level 1) Valedictorian

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A compound is a pure substance that contains 2 or more elements chemically combined together while a mixture are formed when two substances are added together without chemical bonds being formed.

The components of a mixture can be seperated by physical methods, like filtration, distillation, chromotography or decantation etc. while the elements in a compound can only be separated by chemical reactions or electrolysis.

The chemical properties of mixture are the same as those of it components while the physical and chemical properties of a compound are different from those of the elements of a compound.

No chemical reactions takes place when a mixture is formed- usually little or no energy change while a chemical reaction takes place when compound is formed and there would usually be a enery change, which the reactants getting hot as a result.

The components of a mixture can be mixed in any proportion while the elements in a compound are always combined in a fixed proportion, by mass.

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giorgiana1976 | College Teacher | (Level 3) Valedictorian

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A pure, homogenous substance which can be decomposed, through proper methods, in simple  elements is called compound.

 A compound could not be decomposed in its elements, using physichal or mechanical techniques.

A homogenous or heterogeneous substance, which is containing two or more elements or compounds that are in close contact and are combined in any proportion, is called mixture . Unlike the compound,the  mixture components  can be separated using physical methods, which could be evaporation, filtration, sublimation and magnetic separation.

The melting and boiling point are not definite in mixtures, while compounds have melting and boiling point fixed.

The properties of a compound are totally different from its components, while the properties of mixture components are remaining unchanged.

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krishna-agrawala | College Teacher | (Level 3) Valedictorian

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Mixture refers to any substance which is composed of molecules of different types. The molecules in a mixture can be of elements of or compounds. The different element or compounds in a mixture exist together in a state of physical contact with out combining chemically. The different elements and compounds in the mixture retain their original physical properties even after combining to form a mixture.

In contrast a compound is a substance which has molecules composed of atoms of different elements. The different element in the compound combine chemically. The elements present in a compound usually loose their original physical properties, and the compound may possess very different properties. For example oxygen and hydrogen are both gases at normal temperature and pressure, but water, a compound produced by chemical combination of the two, is liquid at normal temperature and pressure.