Chemistry: Solutions

State Council of Educational Research and Training, Tamil Nadu (2020) Chemistry: Solutions. [Teaching/Learning Resource]

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You have learnt about mixtures in your lower classes. Most of the substances that we encounter in our daily life are mixtures of two or more substances. The substances present in a mixture may exist in one or more physical state. For example, when we burn wood, the smoke released is a mixture of solid carbon and gases like CO2 , CO, etc. In some cases of mixtures, their components can be separated easily whereas in some other cases they cannot be. Consider the two mixtures, one which contains salt and water, and the another which contains sand and water. Water is the one of the components in both the mixtures. In the first case salt disolves in water. In the second case the sand does not disolve in water. Sand in water can be separated by filtration but salt cannot be separated as it dissolves in water to form a homogeneous mixture. This kind of homogenous mixtures are termed as “solutions”.

Item Type: Teaching/Learning Resource
Program: A publication under Free Textbook Programme of Government of Tamil Nadu
Learning outcomes: After studying this lesson, students will able to � define solution. � recognize the types of solutions. � analyse the factors influencing solubility. � explain the various modes of expression of concentration of solution. � calculate the solubility of solutes in solvents. � correlate the hydrated salts and anhydrous salts. � distinguish between deliquescent and hygroscopic substances.
Access: Open
Uncontrolled Keywords: Chemistry
Subjects: Science General
Curriculam Level: 4. Junior Secondary
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Depositing User: COL Staff
Date Deposited: 12 Apr 2021 05:16
Last Modified: 22 Apr 2021 00:55

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