Chemistry Practicals Class 9
Difference between Mixture and Compound
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About Simulation
- Engage in hands-on experimentation within this simulation, where you will gain valuable experience in distinguishing between mixtures and compounds.
- Develop a clear comprehension of the difference between mixtures and pure compounds, both in terms of their composition and inherent properties.
- Learn the step-by-step procedures for conducting three distinct tests aimed at distinguishing between mixtures and compounds: assessing behaviour towards a magnet, carbon disulfide, and dilute hydrochloric acid.
- By following these protocols, you can refine your experimental skills and analytical capabilities.
- By exploring these concepts, you can deepen your understanding of the structural and chemical distinctions between these two fundamental types of substances.
Simulation Details
Description
All matter can be classified into two categories: Pure substances and mixtures
A pure substance consists of elements or compounds. Furthermore, mixtures can be classified into homogeneous (uniform appearance and composition throughout) and heterogeneous (made of different substances).
Compounds:
A compound is formed when two or more elements chemically combine. The elements react chemically and form chemical bonds between the atoms of the elements. In compounds, the constituent elements are always present in fixed proportions and therefore, a compound has a definite chemical composition.
The components of a compound lose their individual properties, and the properties of a compound are different from their components. For example, iron is an element that is metallic and has magnetic properties, and oxygen is an element that is a colourless, odourless gas. When iron rusts, it reacts with atmospheric oxygen to form the compound iron oxide.
Iron oxide has different properties from those of iron and oxygen. Iron oxide is a reddish-brown-coloured solid and is non-magnetic. The components of a compound may be separated only by chemical means. Compounds are homogeneous and have fixed melting points and boiling points.
Examples: Water (H2O), sodium chloride (NaCl), ammonia (NH3), ethanol (C2H5OH)
Now, what are mixtures, and how are they classified?
A mixture is a combination of two or more substances that are not chemically the same. The composition of a mixture is variable. In a mixture, the components are present in any proportion, and they can be identified visually within the mixture. In a mixture, the individual components retain their own identities.
The properties of a mixture are the same as the properties of individual compounds. Individual components of a mixture can be separated by physical methods. For example, a magnet can be used to separate iron from a mixture of iron and sulphur.
Mixtures can be homogeneous mixtures or heterogeneous mixtures.
Homogeneous mixtures: Homogeneous mixtures have uniform composition and appearance throughout. A homogeneous mixture is also called a true solution.
Example: Sugar solution, ocean water, soft drinks, etc.
Heterogeneous mixtures: Heterogeneous mixtures consist of different substances.
Examples: A mixture of iron and sulphur, a mixture of sand and table salt, etc.
Watch this video to learn more about chemistry.
Requirements for this Science Experiment
⦁ Sulphur powder ⦁ Iron fillings ⦁ Magnet ⦁ Dil. hydrochloric acid ⦁ Carbon disulphide ⦁ Match stick ⦁ Test tubes ⦁ Test tube holder ⦁ Bunsen burner ⦁ Wire gauze ⦁ Tripod stand ⦁ Tongs ⦁ Glass rod ⦁ Droppers ⦁ Spatula
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