Types of Colloidal System and Examples
It has been described in the article "The Difference Between Solutions, Colloid and Suspensions " that colloid is a heterogeneous mixture that consists of two phases. The two phases present in the colloidal system are called dispersed phases and dispersing mediums.
The phase of a chemical compound can be divided into three types: solid, liquid and gas. The combination of these three phases will form eight colloidal systems.
Let us discuss one by one so that you can understand all kinds of colloidal systems.
Aerosol
The aerosol is a colloidal system whose medium dispersion is gas. If the substance dispersed in the gas phase is solid, then the colloidal system is called a solid aerosol. Examples of the solid aerosol are smoke and dust in the air.
If the dispersed substance in the gas has a liquid phase, then this colloidal system is called a liquid aerosol. Examples of liquid aerosols are fog and clouds.
From the above explanation, aerosols have two colloidal systems.
Many products in everyday life are made in the aerosol form, making it more practical and easy to use. Example:
1. Hair Spray
2. Mosquito repellent
3. Spray paint
4. Perfume
In order to produce aerosols, a booster or propellant gas is required. Gas that is often used as propellant is CFC (Cloro Fluoro Carbon) and carbon dioxide. But the CFC has a negative impact on the environment so its use as propellant is prohibited.
Soles
Soles is a colloidal system in which solid particles are dispersed in a liquid or a solid.
Solid substances dispersed in a liquid are called liquid soles. These solids are generally insoluble in the dispersing medium. One example of a liquid sole is Fe (OH) 3 in water.
Meanwhile, solids dispersed in solids are called solid soles. Example: colored glass. To make colored glass is usually added a metal compound of fine crystals to a hot glass melt. The mixture of these two solids is then cooled.
Emulsion
The emulsion is a colloidal system whose dispersed phase is a liquid. If the liquid is dispersed in a liquid, the system is called a liquid emulsion or just emulsion. Whereas if the liquid is dispersed in a solid, the colloidal system is called a solid emulsion.
Examples of liquid emulsions are milk, coconut milk, and fish oil while examples of solid emulsions are jellies and pearls.
Liquid emulsions may form if the two liquids mixed are not dissolved. Liquid emulsions can be classified into two parts, that is:
1. Oil-in-water oil emulsion. Example: coconut milk, milk, and latex.
2. Water-in-oil emulsion. Example: Mayonaise, petroleum and fish oil.
Water and oil can band together to form emulsions due to the emulsifier. The emulsifier is substances that can emulsify oil and water. One example of emulsifier that we can find at home is soap.
The soap molecule structure contains two ends with different properties. The "tail" end is non-polar and soluble in the oil while the "head" end is polar and soluble in water. With this property, soap can incorporate water and oil and the mixture is more stable.
Besides soap, casein is also an emulsifier contained in milk and egg yolk is an emulsifier in mayonnaise.
The foam
A colloidal system in which gaseous substances dispersed in a liquid is called a foam. In order to form a stable foam, it is necessary other substances to be able to create foam like soap, detergent, and protein.
The foam can be produced by passing a gas into a liquid of soap or detergent.
Foam is used in many industrial processes such as metal ore processing, on fire extinguishers, cosmetics and so on.
Sometimes, the foam is undesirable and needs to be removed. Compounds that can remove or break the foam is called the de-foaming agent.Types of Colloidal System and Examples
It has been described in the article "The Difference Between Solutions, Colloid and Suspensions " that colloid is a heterogeneous mixture that consists of two phases. The two phases present in the colloidal system are called dispersed phases and dispersing mediums.
The phase of a chemical compound can be divided into three types: solid, liquid and gas. The combination of these three phases will form eight colloidal systems.
Let us discuss one by one so that you can understand all kinds of colloidal systems.
The gas that dispersed in the gas substance is not a colloidal system because these two substances can mix homogeneously to form a solution.
The phase of a chemical compound can be divided into three types: solid, liquid and gas. The combination of these three phases will form eight colloidal systems.
Let us discuss one by one so that you can understand all kinds of colloidal systems.
Aerosol
The aerosol is a colloidal system whose medium dispersion is gas. If the substance dispersed in the gas phase is solid, then the colloidal system is called a solid aerosol. Examples of the solid aerosol are smoke and dust in the air.
If the dispersed substance in the gas has a liquid phase, then this colloidal system is called a liquid aerosol. Examples of liquid aerosols are fog and clouds.
From the above explanation, aerosols have two colloidal systems.
Many products in everyday life are made in the aerosol form, making it more practical and easy to use. Example:
1. Hair Spray
2. Mosquito repellent
3. Spray paint
4. Perfume
In order to produce aerosols, a booster or propellant gas is required. Gas that is often used as propellant is CFC (Cloro Fluoro Carbon) and carbon dioxide. But the CFC has a negative impact on the environment so its use as propellant is prohibited.
Soles
Soles is a colloidal system in which solid particles are dispersed in a liquid or a solid.
Solid substances dispersed in a liquid are called liquid soles. These solids are generally insoluble in the dispersing medium. One example of a liquid sole is Fe (OH) 3 in water.
Meanwhile, solids dispersed in solids are called solid soles. Example: colored glass. To make colored glass is usually added a metal compound of fine crystals to a hot glass melt. The mixture of these two solids is then cooled.
Emulsion
The emulsion is a colloidal system whose dispersed phase is a liquid. If the liquid is dispersed in a liquid, the system is called a liquid emulsion or just emulsion. Whereas if the liquid is dispersed in a solid, the colloidal system is called a solid emulsion.
Examples of liquid emulsions are milk, coconut milk, and fish oil while examples of solid emulsions are jellies and pearls.
Liquid emulsions may form if the two liquids mixed are not dissolved. Liquid emulsions can be classified into two parts, that is:
1. Oil-in-water oil emulsion. Example: coconut milk, milk, and latex.
2. Water-in-oil emulsion. Example: Mayonaise, petroleum and fish oil.
Water and oil can band together to form emulsions due to the emulsifier. The emulsifier is substances that can emulsify oil and water. One example of emulsifier that we can find at home is soap.
The soap molecule structure contains two ends with different properties. The "tail" end is non-polar and soluble in the oil while the "head" end is polar and soluble in water. With this property, soap can incorporate water and oil and the mixture is more stable.
Besides soap, casein is also an emulsifier contained in milk and egg yolk is an emulsifier in mayonnaise.
The foam
A colloidal system in which gaseous substances dispersed in a liquid is called a foam. In order to form a stable foam, it is necessary other substances to be able to create foam like soap, detergent, and protein.
The foam can be produced by passing a gas into a liquid of soap or detergent.
Foam is used in many industrial processes such as metal ore processing, on fire extinguishers, cosmetics and so on.
Sometimes, the foam is undesirable and needs to be removed. Compounds that can remove or break the foam is called the de-foaming agent.Types of Colloidal System and Examples
It has been described in the article "The Difference Between Solutions, Colloid and Suspensions " that colloid is a heterogeneous mixture that consists of two phases. The two phases present in the colloidal system are called dispersed phases and dispersing mediums.
The phase of a chemical compound can be divided into three types: solid, liquid and gas. The combination of these three phases will form eight colloidal systems.
Let us discuss one by one so that you can understand all kinds of colloidal systems.
The gas that dispersed in the gas substance is not a colloidal system because these two substances can mix homogeneously to form a solution.
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