IS MATTER AROUND US PURE

SATURATED AND SUPERSATURATED SOLUTIONS

Created byVinay Arya

Last updated 10/2019

English

English [Auto],

What you'll learn

PURE SUBSTANCES, SOLUTIONS, SATURATED SOLUTIONS,SUPER SATURATED SOLUTIONS, COLLOIDS

Course content

1 section • 11 lectures • 2h 8m total length

2.1. CONTENTS12:59
Explore the pure and impure substances around us, including elements, compounds, and mixtures, and learn about solutions, solubility, and separation techniques like distillation, chromatography, and crystallization.
2.2. PURE SUBSTANCES8:42
Identify pure substances and mixtures, distinguishing homogeneous from heterogeneous. Learn that compounds have fixed proportions and see examples like sodium chloride, carbon dioxide, and copper sulfate.
2.3. SOLUTIONS10:30
Explore how a solution forms a homogeneous mixture of solvent and solute, using sugar in water as an example, and explain concentration via dilution and percent by mass.
2.4. SUPER SATURATED SOLUTIONS13:29
Explore super saturated solutions, their solubility behavior, and preparation. Witness crystallization using sodium acetate hydrate seeded to form solid structures.
2.5. COLLOIDS17:06
Distinguish colloids from true solutions and suspensions by particle size and brownian movement, with dispersion medium as a key factor. Learn separation techniques like handpicking, chromatography, and centrifugation.
2.6. CENTRIFUGATION12:34
Explore how centrifugation uses centrifugal forces to separate mixtures, including immiscible liquids and suspensions, with applications like milk cream separation, blood and urine samples, and industrial washing.
2.7. CHROMATOGRAPHY12:16
Learn how chromatography separates colors using paper chromatography, with ink on paper, solvent movement, and capillary action. Explore ascending, descending, and circular chromatography and read chromatograms.
2.8. DISTILLATION13:02
Distillation uses evaporation and condensation to separate liquids, such as alcohol from water, via a fractionating column and condenser based on boiling-point differences.
2.9. CRYSTALLIZATION10:47
Explore crystallization as a physical change and its role in purifying substances, using copper sulfate crystallization from impure solutions, and discuss water purification via sedimentation, filtration, and sterilization.
2.10. CHEMICAL CHANGES7:47
Explore chemical changes that form new substances through reactions, contrast them with reversible physical changes, and review elements, metals, and magnesium oxide formation.
2.11. COMPOUNDS8:50
This lecture explains compounds as substances formed by elements in fixed proportions, unlike mixtures separable by physical means; water and sodium chloride illustrate fixed ratios and changing properties.
Innovation

Requirements

Basics of Purity of Matter

Description

We know all the matter around is not pure. If we observe some soil (Mitti) and some surge placed on two different sheets of paper with a magnifying glass, we find soil contains clay particles, some grass particles and even some dead insects etc. That is soil particles of different kinds is called an impure substance.

Type of matter : -

On the basis of chemical nature, matter can be classified into two types :

(i) Pure substance. (ii) Impure substance (mixture)

(i) Pure substance :- A homogeneous material which contains particles of only one kind has a definite set of properties, is called a pure substance .

A pure substance is a distinct type of matter that can not be separated into other matter by any physical process eg. oxygen, sulphur, iron etc. are pure substance however, if a substance is composed of two or more different kinds of particles combined together in fixed proportion by weight, then the substance is also regarded as pure substance. e.g. Sodium chloride is a pure substance, because it has a fixed number of sodium and chloride ions, combined together in fixed proportion by weight, Similarly, magnesium oxide (MgO), Carbon dioxide, copper sulphate etc. are pure substance.

(ii) Mixture :- When two or more substance (elements, compounds or both) are mixed together in any proportion, such that they do not undergo any chemical change, but retain their individual characteristics, the resulting product is called a mixture. e.g. Brass is mixture of copper and zinc.

Who this course is for:

Beginners, 10 grade students and research Scholars