Chemistry: Solution, Suspension & Colloids

Chemistry: Solution, Suspension & Colloids

 

Solution:

• Homogeneous mixture with particle size < 1 nm diameter
• Does not separate out on keeping still & cannot be separated by filtration
• Does not scatter light due to extremely small particles
• Examples include: Carbonated drinks, Salt & Sugar solution

 

Suspension:

• Heterogeneous mixture with particle size > 100 nm in diameter
• Particles settle down on keeping still & separates out by filtration
• Scatters a beam of light with particles of the solute seen easily.
• Examples include: Sand in water, Milk of magnesia, Chalk solution in water

 

Colloids:

• Heterogeneous but appears homogeneous with particle size b/w 1 – 100 nm in diameter
• Does not separate out on keeping still
• Separates out on centrifugation, not by filtration
• Scatters a beam of light – Tyndall Effect
• include Milk, Blood, Soap solution, Ink, Jelly, Starch solutions, Body lotions, Foam, Gels, Gemstones etc.

 

Solubility:

• Maximum quantity of solute in 100 gm of solvent at a particular temperature
• Increases on increasing the temperature in liquids ( Decreases in case of gas)
• No effect of pressure in liquids (solubility increases in case of gases on increasing pressure) 
• Saturated Solution → No more solute can be dissolved without increasing temperature
• Unsaturated Solution → More solute can be dissolved without increasing temperature