Mixtures can be classified as homogeneous or heterogeneous. Compounds are substances that are made up of more than one type of atom. Elements are the simplest substances made up of only one type of atom. This page was constructed from content via the following contributor s and edited topically or extensively by the LibreTexts development team to meet platform style, presentation, and quality:.
Chem1 Virtual Textbook. Learning Objectives Explain the difference between a pure substance and a mixture. Explain the difference between an element and a compound.
Explain the difference between a homogeneous mixture and a heterogeneous mixture. Phase A phase is any part of a sample that has a uniform composition and properties. If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture.
If its composition is uniform throughout, it is a homogeneous mixture. Solution A Tea is a solution of compounds in water, so it is not chemically pure. It is usually separated from tea leaves by filtration. B Because the composition of the solution is uniform throughout, it is a homogeneous mixture. A Orange juice contains particles of solid pulp as well as liquid; it is not chemically pure.
B Because its composition is not uniform throughout, orange juice is a heterogeneous mixture. A A compact disc is a solid material that contains more than one element, with regions of different compositions visible along its edge. Hence, a compact disc is not chemically pure.
B The regions of different composition indicate that a compact disc is a heterogeneous mixture. A Aluminum oxide is a single, chemically pure compound. The constituents or components of a mixture and compound can easily be separated. Compounds and mixtures are made up of different elements or different atoms.
A compound can be broken down into its constituents. Some examples of compounds are sodium chloride common salt , water, etc. A mixture is composed of two or more elements or compounds in a non-fixed ratio. They have no physical interactions. A solution contains two substances that are chemically mixed to form a new compound. Solute and Solvent are the part of the solution where the dissolved matter in any solution or mixture is called as the solute, while the liquid or gas that dissolves another liquid, solid or gas is called as the solvent.
A solution can be defined as the homogenous mixture of two or more substances. A solution is a mixture where one of the substances dissolves in the other. The substance that dissolves is called the solute. The substance that does not dissolve is called the solvent.
An example of a solution is salt water. The constituents or components of a mixture can easily be separated by physical methods such as filtration or distillation. The constituents of compounds cannot be identified visually and lose their individual identities.
The constituents of mixtures do not lose their individual identities, they can be identified visually. A compound is a pure substance , which only contains one kind of molecule. A mixture is an impure substance which contains various types of molecules. A new substance is formed after the constituents are chemically combined and in this regard, a compound will definitely have different properties from its original constituents.
No new substance is formed after constituents are combined to form a mixture and in this regard, the properties of the mixture will definitely depend upon the properties of its constituents.
Salt NaCl , hydrogen peroxide, Baking soda, Methane, water, magnesium chloride, potassium chloride, magnesium oxide or zinc oxide. Oil and water, sand and water, smog smoke and fog , sugar and salt, maize and beans, alcohol and water etc.
During chemical combination effects such as evolution of heat, odor, explosion, volume changes and emissions may be observed. During mixing of a mixture only volume changes will be noticed.
Effects such as explosion, evolution of heat, emissions and odor are necessarily not observed. In a compound, there is strong bonding between the elements and an observable chemical reaction.
0コメント