Question

Preparation of a suspension of soil chalk powder and fine sand in water laboratory

Answer 1

The suspension of soil chalk powder and fine sand in water laboratory

Explanation:

Suspension

It is the solution in which the solute size is more than 100 nm .

Properties of suspension

• It is a heterogeneous mixture.
• Particle size is more than 1000 nm (10-6 m) and can be seen with naked eyes.
• The particles of suspension, in its suspended form scatter a beam of light, i.e., shows Tyndall effect.
• It is unstable.
• The particles can be separated by filtration.
• It is opaque.

To prepare a suspension of soil, chalk powder and fine sand in water. Suspension of sand in water:

• Take say 100 mL of distilled water in a beaker
• To it add say, 10 g of fine sand in it.
• Set well using a glass rod.
• In few minutes you will see the suspension gets ready .

Answer 2

Answer:

True solution: A solution that has solute particles of size smaller than 1 nm (10-9 metres) in diameter, and cannot be seen with naked eyes. They do not scatter a beam of light, the particles do not separate by filtration and the particles do not settle down.

Suspension: It is a heterogeneous mixture in which solute particles do not dissolve but remain suspended, particles can be seen with naked eyes, it scatters a beam of light, particles can be separated from the mixture by filtration.

Colloidal solution: The solution appears to be homogeneous, the particles can scatter a beam of light, they do not settle down when left undisturbed, it is stable and particles cannot be seen by naked eyes. The particles cannot be filtered. The size of particles is between 10-7 cm to 10-4 cm in diameter