Difference between Compound and Mixture

Definition of Compound and Mixture

What is a Compound?

A compound is a substance created by when two or more chemical elements are bound together. There are so many examples of a compound that are used on regular basis including sodium chloride (NaCl, a common salt use at every place), sodium chloride (Na2CO3, commonly found in manufacturing paper, soap, glass, and photography).

The type of bonds holding together in a compound can vary i.e. covalent bonds and ionic bonds. The elements are present in a fixed ratio whether it is available in any compound. There are some examples of the compound mention below that help to understand you in a good manner.

Example 1- Pure water- It is a compound made from two elements i.e. hydrogen and oxygen. In which each molecule of water contains 2 hydrogen atom bonded to a single oxygen atom. In simple words, the ratio of hydrogen to oxygen in water is 2:1.
Example 2- Pure Methane – This compound is also made up of two elements- carbon and hydrogen in the ratio of 4:1.
Example 3- Pure table salt- The two elements present in pure table salt is sodium and chlorine. However, these two elements share an equal ratio i.e. 1:1.
Example 4- Pure Glucose – This is the compound that is made from three elements i.e. carbon, hydrogen, and oxygen. Hydrogen share double ratio than carbon and oxygen – 2:1:1.

What is a Mixture?

A mixture is a substance composed of two or more matter that can be separate with the help of physical methods. There are some examples of the mixtures that are present around you like a solution of water and salt, sugar and water, different gases, air in the atmosphere and many more. Below are some other examples of a mixture.

Examples of common mixtures are as follows:

1. Seawater - It is a mixture of various salts and mixture.
2. Gunpowder – It is a mixture of Potassium Nitrate and carbon.
3. Ink – It is a mixture of different coloured dyes which can be separated by using Chromatography.
4. Crude oil – It is a mixture of organic compounds that includes hydrocarbons.
5. Dry Air – It is a type of much different type of gases like nitrogen, oxygen, carbon dioxide, argon, neon, and other tiny traces gases. (Air generally contains water vapour as a part of mixture)

These are some possible heterogeneous and homogeneous mixtures.
In the given example of a mixture, the various components do not combine through any kind of chemical changes. Therefore, the components mix with others does not lose their individual properties. Moreover, mixtures are divided into types based on their composition.

Types of Mixtures 

• Homogeneous
• Heterogeneous

Homogeneous Mixture

Homogeneous Mixtures are those that have composition throughout their body. For instance - a mixture of salt and water, sugar and water, lemonade, soda water etc. The example of salt and water is a classic example because there is no differentiating between the mixture of salt and water. The light of passed through the mixture of salt and water is not seen. This kind of mixture has a uniform composition that does not separate readily. The properties of every part of the homogeneous mixture are the same. Below are some homogenous mixture properties are given.

The properties of a homogeneous mixture are as follows:

• The boundaries of the particles of the substance cannot be differentiated.
• Every example of the mixture is a homogeneous mixture.
• The particles of mixtures are less than one nanometre.
• These particles do not show Tyndall effect.
• The constituent particles cannot be separated by using centrifugation or decantation.
• The example of this mixture is Alloy.

Heterogeneous Mixture

Heterogeneous mixtures are those where there is a lack of uniform composition. A mixture of soil and sand, oil and water, sulphur and iron filings and many more are the examples of heterogeneous mixtures. In this, the boundaries of the constituent particles can be identified easily because it has two or more distinct phases. It is rarely possible to separate the particles from each other. Sometimes some mixtures appear as heterogeneous at a normal scale become more homogeneous on a large scale. For instance- Sand is a heterogeneous mixture if you examine it in the palm of your hand and seems homogeneous if you have a view of an entire beach. Here, some properties of the heterogeneous mixture are explained below for better understanding.

The properties of a heterogeneous mixture are as follows:

• In a heterogeneous mixture, the constituent particles are present uniformly.
• Most of the mixtures are heterogeneous except alloys and solutions.
• You can identify the components easily in the heterogeneous mixture.
• The particles show a Tyndall effect.
• The size of the particles is between one nanometer and one micrometer.

Difference between Compound And Mixture
1. DefinitionA compound is the substances that are formed by combining two are more chemical elements. A mixture is a substance created from two or more matter that can be separate with the help of physical methods.
2. NatureCompound substances are always homogeneous in nature.Nature of Mixture substances can either be homogeneous or heterogeneous.
3. ExamplesWater (H2O), Sodium Chloride (NaCl), Sodium Bicarbonate (NaHCO3), salt, sugar, and baking soda are some of the examples of compound substance.A mixture of oil and water, sand and soil, sulphur and iron filings, smoke and fog (smog) etc are some examples.
4. Types Compounds are of three types i.e. covalent compounds, a metallic compound, and ionic compounds. Moreover, compounds can also be classified as organic or inorganic compounds based on the presence of the carbon atom. There are two main types of mixture i.e. homogeneous and heterogeneous.
6. Substance category Mainly pure water is part of the compound.Mixtures fall under impure water.
7. Separation of constitutionThe only methods that can be separate constituents of compounds are chemical and electrochemical (like extraction).The constituents of a mixture can easily be separated by physical (like filtration) method.
8. CompositionThe ratio of the elements in compounds is always fixed. They contain only one type of molecule. Also, the elements chemically combined. Whereas, a mixture can have a variable composition of substance in forming but the ratio is not fixed nor they are combined via chemical bonds.
9. RepresentationA compound is represented using its chemical formula.A mixture cannot be represented by using formula.
10. Properties In a compound, the properties are peculiar to itself as the constituents of a compound lose their original propertiesThe constituents of a mixture do not lose their property. So, the mixture properties are generally a sum of the properties of its constituents.
11. New substanceWhen two or more constituents are chemically combined, they together formed a new substance.No new substance is formed in mixtures and its properties depend upon the properties of its constituents.
12. Melting and boiling pointThe melting and boiling point of a compound is defined.No melting and boiling point is defined in a mixture.
13. Mass ratioA compound is depending upon specific ratio.Mixtures have a variable mass ratio depending upon the number of ingredients.