Tag: homogenous and heterogenous mixtures

Gun powder is a mixture of Sulphur, Charcoal and Potassium nitrate.

Sugar solution is a homogeneous mixture because any substance dissolve in water is homogeneous mixture.

The air that we breathe is a homogeneous mixture of oxygen, nitrogen, argon, and carbon dioxide, along with other elements in smaller amounts. Because each layer of the Earths atmosphere has a different density, each layer of air is its own homogeneous mixture.

In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

Note that a mixture:

• consists of two or more different elements and/or compounds physically intermingled,
• can be separated into its components by physical means, and
• often retains many of the properties of its components.

Apple juice is a fruit juice made by the maceration and pressing of apples. 
so its a mixture.

True Solution is a homogeneous mixture of two or more substances in which substance dissolved (solute) in solvent has the particle size of less than 10-9 m or 1 nm. Simple solution of sugar in water is an example of true solution. Particles of true solution cannot be filtered through filter paper and are not visible to naked eye.
Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i.e. between 1-1000 nm. Smoke from a fire is example of colloidal system in which tiny particles of solid float in air. Just like true solutions, Colloidal particles are small enough and cannot be seen through naked eye.They easily pass through filter paper. But colloidal particles are big enough to be blocked by parchment paper or animal membrane.
blood, starch, ink : Colloidal Soln.
sugar sol., salt sol : true soln.