A colloid is used as thickening agents in industrial products such as lubricants, lotions, toothpaste, coatings, etc. In the manufacture of paints and inks, colloids are useful. In ball-point pens, the ink used is a gel (liquid-solid colloid).

Examples of Colloids

Types of Colloids and Examples Colloids are classified according to the state of the dispersed phase and the dispersion medium. For example, the milk which contains a colloidal suspension of protein-rich casein micelles with a hydrophobic core. When milk ferments the lactose is converted to lactates and hydrogen ions.

Particles of cornstarch are just the right size (about 100 to 800 nanometers in diameter) to make a colloidal solution with water. Add one tablespoon of the cornstarch to the small bowl or cup. Fill the empty cup, mug or drinking glass with water.

A colloid has small clumps of one material in another (e.g. milk in water or flour in water). The particles are large enough to block light, so a colloid does not let light pass through, and looks cloudy. If students add enough flour or milk powder, some may settle on the bottom and be classified as a suspension.

The types of colloids includes sol, emulsion, foam, and aerosol.

• Sol is a colloidal suspension with solid particles in a liquid.
• Emulsion is between two liquids.
• Foam is formed when many gas particles are trapped in a liquid or solid.
• Aerosol contains small particles of liquid or solid dispersed in a gas.

Colloids are common in everyday life. Some examples include whipped cream, mayonnaise, milk, butter, gelatin, jelly, muddy water, plaster, colored glass, and paper. Every colloid consists of two parts: colloidal particles and the dispersing medium.

Combining different substances can result in five main types of colloid mixtures: aerosols, foams, emulsions, sols and gels. Some of these colloids exist naturally in the world, while others are man-made products.

Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium. The particles of a colloid remain dispersed and do not settle due to gravity, and they are often electrically charged.

Examples of colloid are mayonnaise, milk, butter, gelatin, jelly, muddy water.

A solution in which the size of solute particles is intermediate between those in true solution and suspension is called as Colloids. For Example: Soap Solution,Starch solution,milk,Blood,ink etc.

Viscoelastic colloidal gels, such as bentonite and toothpaste, flow like liquids under shear, but maintain their shape when shear is removed. It is for this reason that toothpaste can be squeezed from a toothpaste tube, but stays on the toothbrush after it is applied.

Examples of Colloids

Toothpaste is a colloid, because it’s part solid and part liquid. Shaving cream and other foams are gas dispersed in liquid. Jello, toothpaste, and other gels are liquid dispersed in solid. Dough is a solid dispersed in a liquid.

Blood has the characteristic of both a colloid and a suspension making it a colloidal suspension. In its normal stable state, blood is a suspension, which is a colloid. It mainly consists of red & white blood cells, and lymphocytes suspended in plasma.

Milk is a colloid, with tiny globs of butterfat suspended throughout the liquid. Whipped cream is a colloid too. Colloids typically don’t separate into their individual components over time.

colloid. a mixture of two substances which are immiscible (see MISCIBLE), but where the particles of one are too small to settle out, and so remain suspended indefinitely. Glue is a colloid of animal gelatin in water; the water is defined as the matrix and the gelatin as the inclusion.

Muddy water is a classic suspension, with relatively large solid particles suspended in water. These intermediate sized particles are big enough to scatter light, but small enough to remain suspended in the liquid. Aerosols, glues, jelly, and smoke are all colloids.

Apple juice can be a heterogeneous mixture or a homogenous mixture. The fiber and other nutrients in the apple serve as the solute and the water is the solvent. If the apple juice has visible particles (fiber strands or powdery particles), then it is a heterogeneous mixture.

Cheeses and yogurts are complex colloidal suspensions made from animal’s milk. The colloidal suspension of milk can be described an oil in water emulsion, with insoluble proteins forming complicated micelles in a water solution.

11.7: Colloidal Suspensions

Colloids contain some particles that are intermediate between those in a solution and those in a suspension. Examples include peanut butter, pudding, Jello, whipped cream, and even fog!

A colloid is a solution in which the particle size ranges between 10-7 and 10-5 cm. For example, milk, blood, honey, smoke, ink, gum, starch solution etc. Saturated solutions have the maximum amount of solute dissolved in them. No more solute can be made to dissolve.

What’s Your State?

Coffee is both a solution and a suspension: When in water, coffee beans contain many water soluble compounds that dissolve in the water. These are the color and flavor of coffee you want. This is a solution.

Honey normally has fructose, proteins, other colloidal substances, and water in it but it contain only 0.1% approx of these contents. So in above options honey is best answer.

Air is not a colloid.

What is a colloidal solution? Substances such as sugar, salt when put in water get dissolved completely and form a homogenous solutions. This means that the molecules of sugar are dispersed uniformly in water. Such particles belong to a state termed as colloidal state.

Honey is, at its simplest level, a mixture of various carbohydrates in water. This leaves 17% which is water. So there are lots of different solutes, but they are present in tiny quantity, the main ones are fructose and sucrose.