The website has the complete lesson note for all the subjects in secondary school but this piece showcases the SS1 Chemistry Lesson Note on Standard Separation Techniques for Mixtures. You can use the website search button to filter out the subject of interest to you.

CLICK HERE to download the complete Document: DOWNLOAD HERE

TOPIC: STANDARD SEPARATION TECHNIQUES FOR MIXTURES

CONTENTS:

  1. MIXTURES AND COMPOUNDS
  2. SEPARATING A MIXTURE OF TWO SOLIDS
  3. SEPARATING A MIXTURE OF AN INSOLUBLE SOLID AND A LIQUID,
  4. 4. SEPARATING A SOLUBLE SOLID FROM A LIQUID

PERIOD 1: COMPOUNDS AND MIXTURES

COMPOUND

A compound is a substance which contains two or more elements chemically combined together. A compound is formed as a result of a chemical change. It is a new substance with entirely different properties from those of substances from which it is formed. For example water is a compound of hydrogen and oxygen chemically combined in the ratio 2:1 by mass respectively. Other example of mass are sound, limestone, common salt, petrol, kerosene   etc.

MIXTURE:

A mixture is made up of two or more substances which can be mixed together, mechanically, in any proportion. It can be said to contain two or more constituents which easily be separated by physical method. Examples are air, soil, well water, tap water, milk, sweat, blood etc.

DIFFERENCES BETWEEN COMPOUNDS AND MIXTURES

COMPOUNDS MIXTURES
1. Constituents are present in a fixed proportion by mass Constituents can be mixed in any proportion
2. Constituents are joined by chemical bonds No chemical bond between constituents
3. It is always homogeneous It may be homogeneous or heterogeneous
4.The properties differ entirely from those of its component’s elements The properties are the sum of those of its individual constituents
5. Constituents of compounds cannot be separated by physical means Components of mixtures can be separated by physical means
SEE ALSO  JSS2 Basic Technology Lesson Note on Environmental Rescue Operation; Vehicle Rescue Operation and Victims Rescues Operation

EVALUATION:

  1. Define and give one example of (a) homogeneous mixture (b) heterogeneous mixture
  2. Describe an experiment to show that sea water is a mixture.
  3. Explain why air is regarded as a mixture

PERIOD 2: SEPARATING A MIXTURE OF TWO SOLIDS

They following methods are employed in the separation of a mixture of two solids:

  1. Sieving
  2. Magnetic separation
  3. Sublimation

Click on the Downloadable Button to get the FULL NOTE

Copyright warnings! Do not copy.

The Secret To Relocate To Canada Without IELTS. Watch The Training Videos For Free.