Solutions, Suspensions And Colloids
Before we discuss the solutions, suspensions and colloids in detail, we should know the meaning of two terms : solute and solvent. The 'substance which is dissolved' in a liquid to make a solution is called 'solute', and the 'liquid' in which solute is dissolved is known as'solvent'.For example, salt solution is made by dissolving salt in water, so in salt solution, 'salt' is the 'solute' and 'water' is the 'solvent'. Similarly,the substances like sugar, ammonium chloride, copper sulphate and urea, etc.,which are dissolved in water to make solutions are called 'solutes', whereas water is the 'solvent'. Usually, the substance present in lesser amount in a solution is considered the solute, and the substance present in greater amount in a solution isconsidered the solvent. Please note that the solute particles are also called 'dispersed particles' and solvents are also known as 'dispersion medium'. Solutions, suspensions and colloids differ in the size of solute particles (or dispersed particles), the size of particles being minimum in solutions and maximum in suspensions.
Though most of the common solutes are solids but even the liquids and gases can also be solutes.Water is the most common solvent. So, most of the solutions are those in which water is the solvent. Water is an aqueous solvent. The organic liquids like alcohol, acetone, carbon tetrachloride, carbon disulphide and benzene are called non-aqueous solvents. The solutions made by dissolving various solutes in water are called aqueous solutions. On the other hand, the solutions made by dissolving solutes in organic liquids are called non-aqueous solutions. We will now discuss the solutions, suspensions and colloids in detail, one by one. Let us start with the solutions.
Notes
Matter in Our Surroundings - Notes
1. 11. Metals Usually Have a Silver or Grey Colour
Show Notes
2. The Case of a Liquid Solute Dissolved in a Liquid Solvent
Show Notes
8. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
Show Notes
10. 3. Non-Metals are Bad Conductors of Heat and Electricity.
Show Notes
11. 6. Metals are Usually Strong. They Have High Tensile Strength.
Show Notes
18. Chemical Formula for daily use material
Show Notes
24. To Study the Properties of a Compound of Iron and Sulphur
Show Notes
28. 4. Metals are Lustrous (or Shiny), and can be Polished.
Show Notes
30. To Separate a Mixture of Alcohol and Water
Show Notes
31. To Study the Properties of a Solution
Show Notes
34. 7. Metals are Solids at the Room Temperature
Show Notes
40. To Study the Properties of a Suspension
Show Notes
41. To Separate the Salt-Water Mixture (or Salt-Solution)
Show Notes
47. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
Show Notes
50. Separation of Mixture Of Two Solids
Show Notes
