Mixture Compound Composition Variable composition - the relative amounts of the two gases can be changed. Constant composition - water always contains the same ratio of hydrogen to oxygen. This ratio is shown in the chemical formula of the compound - H 2 O. Joined or not? The hydrogen and oxygen are not joined together. The hydrogen and oxygen have joined together to form the new substance water. Properties Keeps the properties of the substances involved.
This mixture is in the gas state. Properties are different from those of the elements it contains. This compound is a liquid. Separation The substances in the mixture can be separated. Heterogeneous Mixture. Heterogeneous mixtures are those where there is a lack of uniform composition. A mixture of soil and sand, oil and water, sulphur and iron filings and many more are the examples of heterogeneous mixtures.
In this, the boundaries of the constituent particles can be identified easily because it has two or more distinct phases. It is rarely possible to separate the particles from each other. Sometimes some mixtures appear as heterogeneous at a normal scale become more homogeneous on a large scale. For instance- Sand is a heterogeneous mixture if you examine it in the palm of your hand and seems homogeneous if you have a view of an entire beach. Here, some properties of the heterogeneous mixture are explained below for better understanding.
The Properties of a Heterogeneous Mixture are as Follows:. In a heterogeneous mixture, the constituent particles are present uniformly. Most of the mixtures are heterogeneous except alloys and solutions. You can identify the components easily in the heterogeneous mixture. The particles show a Tyndall effect. The size of the particles is between one nanometer and one micrometer. A compound is the substances that are formed by combining two are more chemical elements.
A mixture is a substance created from two or more matter that can be separate with the help of physical methods. Compound substances are always homogeneous in nature. Nature of Mixture substances can either be homogeneous or heterogeneous. A mixture of oil and water, sand and soil, sulphur and iron filings, smoke and fog smog etc are some examples. Compounds are of three types i. Moreover, compounds can also be classified as organic or inorganic compounds based on the presence of the carbon atom.
There are two main types of mixture i. Substance category. Mainly pure water is part of the compound. Mixtures fall under impure water. Separation of constitution. The only methods that can be separate constituents of compounds are chemical and electrochemical like extraction. The constituents of a mixture can easily be separated by physical like filtration method.
The ratio of the elements in compounds is always fixed. They contain only one type of molecule. Also, the elements chemically combined. Whereas, a mixture can have a variable composition of substance in forming but the ratio is not fixed nor they are combined via chemical bonds.
A compound is represented using its chemical formula. Composition Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined. Mixtures contain different elements and compounds but the ratio is not fixed nor are they combined via chemical bonds. The ingredients are physically mixed but chemically separate.
Often they are visibly distinct. A mixture can be separated into simpler substances by physical or mechanical methods. Salt in water; pasta and sauce; sand; pebbles; solutions such as rubbing alcohol, dental amalgam, vapor in air; colloids such as mayonnaise, milk, cheese; coarse suspensions such as mud in water, oil in water.
Representation A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound.
Mixtures cannot be represented by chemical formulas. Chemical and physical properties Compounds have specific chemical and physical properties that are distinct from their constituent elements because the constituent elements lose their properties when they combine to make the compound. Mixtures do not have specific, consistent chemical and physical properties of their own. They reflect the properties of their constituent substances, which retain their original properties.
Compounds are classified into molecular compounds, ionic compounds, intermetallic compounds and complexes. Solids, Liquids and Gases can be combined to create a mixture.
Mixtures can be homogeneous or non-homogeneous. Mass ratio Compounds have specific mass ratios. This is true of all pyrite no matter the sample size.
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