It isn't always easy to tell a homogeneous mixture from a heterogeneous mixture. You may need to observe the properties of a mixture before you decide. The size of the particles in a mixture has an effect on the properties of the mixture. Based on the size of its largest particles, a mixture can be classified as a solution, a suspension, or a colloid.
If you place a spoonful of sugar (C12H22O11) in a glass of hot water (H2O) and stir, the sugar dissolves in the water. The result is a homogeneous mixture of sugar and water. When substances dissolve and form a homogeneous mixture, the mixture that forms is called a solution.
Liquid solutions are easy to recognize. They do not separate into distinct layers over time. If you pour a liquid solution through a filter, none of the substances in the solution are trapped in the filter. You can see through solutions that are liquids because light passes through them without being scattered in all directions. These three properties of liquid solutions can be traced to the size of the particles in a solution. The particles in a solution are too small to settle out of the solution, be trapped by a filter, or scatter light.
Suspension - ang magbasa nito kamuka si king kongEdit
Have you ever seen the instruction "Shake well before using" on a bottle? This instruction is a clue that the material in the bottle is a suspension. A suspension is a heterogeneous mixture that separates into layers over time. For example, if you shake up a container of sand and water, the sand mixes with the water and forms a suspension. Over time, the suspended particles of sand settle to the bottom of the container.
You could use a filter to separate the sand from the water. The water would pass through the filter, but the sand would remain in the filter paper. Suspended particles settle out of a mixture or are trapped by a filter because they are larger than the particles in a solution. Because larger particles can scatter light in all directions, suspensions are cloudy.
Colloids - nag magbasa nito mukang mongcolloidEdit
A colloid contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension. Like solutions, colloids do not separate into layers. You cannot use a filter to separate the parts of a colloid.
Fog is a colloid of water droplets. Automobiles have headlights with low beams for normal driving conditions and high beams for roads that are poorly lit. With the high beams, a driver can see a bend in the road or an obstacle sooner. But the high beams are not useful on a foggy night because the water droplets scatter light back toward the driver and reduce visibility. With the low beams, much less light is scattered. The scattering of light is a property that can be used to distinguish colloids and suspensions from solutions.