Answer:Difference Between Mixtures and Compounds

July 4, 2018 By Rachna C 1 Comment

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The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. For instance, Seawater, Crude oil, Mineral oils, Alloys (Brass, Bronze), etc., are some of the mixtures, Water (H2O), HYDROGEN Peroxide (H2O2), Sodium Chloride (NaCl), Baking Soda (NaHCO3), etc. are the name of some compounds.

As per the classical physics theory, anything that occupies space has mass and volume is known as the matter. Even matter can be classified into two classes, mixtures, and the pure substances. Pure substances are made up of elements and compounds.

Elements are the simple substance and further cant be broken into more simpler forms. It contains only one type atom, but compound has two or more different atoms or elements, on the other hand, mixtures contain different substances.

On the way of highlighting the DIFFERENCES between mixtures and compounds in this content, we will be giving a brief description of them.

Content: Mixtures Vs Compounds

Comparison Chart

Definition

Key Differences

Conclusion

Comparison Chart

BASIS FOR COMPARISON MIXTURES COMPOUNDS

Meaning

Mixtures are the impure substances, made up of two or more physically mixed substances. They can be homogeneous or heterogeneous by nature. Compounds are the pure form, made up of two or more chemically mixed elements. These are generally homogeneous.

Composition

The substances which are found in the mixtures are not in fixed quantity, that means their ratio varies. But in the case of compounds, the elements are present in fixed quantity, that means their ratio is fixed.

Properties

The properties of the mixtures also vary (not fixed) as it depends on the type of substances and the quantity by which these are being mixed. For the particular type of compound, the properties are fixed and do not vary, as the elements present in the compounds are fixed and are in the fixed ratio.

Formula Mixtures do not have a certain formula.

Compounds have a specific formula, DEPENDING on the constituents present.

Separation

The substances of the mixtures are easy to separate by different physical methods like filtration, chromatography, evaporation.

The elements are not easy to separate and if done than it is by chemical methods.

Substances No new substances are formed from the mixtures, due to the unchangeable properties of its constituents.

There is always formation of the new substances, due to the mixing of the chemical properties of the different constituents.

Melting/Boiling point

Mixtures do not have fixed melting or boiling point.

The compound once formed, have fixed melting and boiling point.

Heat change

There is no heat change, or involvement of energy is observed when mixtures are made. There is a heat change, and energy is used or released during the formation of the compounds, as it is a chemical reaction.

Examples

Alloys like brass, bismuth, chromium, oceanic water (salt and water), mixtures of gases, etc. Compounds like Baking soda, Methane, Salt, etc.

Definition of Mixtures

When we look we found many things around us are mixtures, like air, rocks, the oceans, and even the atmosphere. These have the constituents mixed with physical properties and not with any chemical ones and not even in a fixed ratio. Therefore, we can say that formation of mixtures takes place by blending of two or more substances, but not in a fixed ratio.

In mixtures there is no occurrence of the chemical reaction, the fusion takes place in physically. So mixtures have two or more different types of atoms or molecules, or at least one atom and one MOLECULE. Mixtures do not have fixed melting or boiling point.

Mixtures can be separated by the physical methods such as filtration, decantation, distillation. Mixtures can be either homogeneous or heterogeneous.

Homogeneous Mixtures – These are regarded as true solutions, as the constituents present in this type are uniformly or equally distributed all over. For example sugar solution, mixing alcohol and water, etc.

Heterogeneous Mixtures – When the constituents are not evenly distributed in the mixture, it is known as the heterogeneous mixtures. For example, oil and water when mixed, a mixture of sulfur and iron, gravel, etc.

Apart from the above two, mixtures are further classified on the basis of the type of size of the particles present in that. These are solutions, suspensions, colloids.

Solutions – These contain the particles of the nano size, which are less than 1nm in diameter. The solution cannot be separated by the decantation or the centrifuge method. Dissolved oxygen in the water, air, gelatin are some of the examples.

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