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A chemical solution is a special type of homogeneous mixture composed of two or more substances. A solute is a substance dissolved in another substance known as a solvent. A homogeneous means that the compounds of the mixture form a single phase. Heterogeneous means that the components of the mixture are of different phase. Usually this substance present in the greatest amount is considered the solvent. Solvents can be gases, liquids or solids. The solution has the same physical state of the solvent.
Gaseous Solutions: If the solvent is a gas only gases are dissolved under a given set of conditions. An example of a gaseous solution is air where oxygen and other gases are dissolved in nitrogen.
Liquid Solutions: If the solvent is a liquid than almost all gases or liquids and solids can be dissolved. An example of a gas and a liquid solution is oxygen in water.
Solid Solutions: A good example of a solid dissolving in a liquid is sugar dissolving in water. If the solvent is a solid then gases, liquids and solids can be dissolved.
A chemical reaction is a process that leads to a chemical transformation. the substance or substances involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by some type of chemical change and they yield one or more products which have properties that are different than the reactants. Chemical reactions occur when two or more molecules interact and the molecules change. The bonds between atoms are broken and created again to form a new molecule. One example of a chemical reaction is the rusting of steel. Rusting happens because the iron in the metal combines with oxygen in the atmosphere. Chemical bonds are created and destroyed to finally make iron oxide, iron oxide is another name for rust.
A chemical mixture is formed when two or more substances are combined in yet each substance retained its own chemical identity. Mixtures can be either homogeneous or heterogeneous. A homogeneous mixture the composition is uniform and every part of the solution has the same properties examples include alcohol and water. Heterogeneous mixture is a type of mixture in which the components can be seen and there are two or more phases present. An example of a heterogeneous mixture is air, a mixture of nitrogen oxygen and smaller amounts of other substances.
A chemical compound is a chemical substance composed of atoms from more than one element held together by a chemical bond. All of the matter in the universe is composed of atoms of more than 100 different chemical elements found in pure form and combined. When new compounds form they have few, or sometimes even none, of the physical or chemical traits of the original elements, they have a new life on their own. There are millions of different compounds around you. Chemical changes in compounds happen when chemical bonds are created or destroyed.
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