Preparation of true solution, suspension and colloidal solution and suspension
Answers
True solutions can be prepared by mixing sugar and water or salt and water.......
Suspensions can be made by mixing sand/chalk powder in water........
colloids could be prepared by mixing starch to water......
Answer:
Answer:-
AIM
To prepare A true solution of common salt, sugar and alum. A suspension of soil, chalk powder and fine sand in water.
A colloidal solution of starch in water and egg albumin in water and distinguish between these on the basis of transparency, filtration, stability.
MATERIALS REQUIRED
Test tubes, beakers, water, common salt, sugar, alum, soil, chalk powder, fine sand. egg albumin, starch, funnel, glass rod, filter paper.
THEORY
A true solution has particle size < 10-9 m. It is a homogeneous mixture which is clear and transparent. It passes through the filter paper easily and is stable.
Colloid has particle size 10-9 m- 10-6 m. It is heterogeneous and is translucerft. It passes through filter paper and is stable.
The particle size of Suspension is >10-6 m. It is heterogeneous and opaque. Its particles do not pass through filter paper and settle under gravity when left undisturbed for sometime.
PROCEDURE
- Preparation of solutions/mixtures.
Take 8 beakers and label them as A, B, C. D, E, F. G and Hand add 50 ml of water to each of these beakers
Add samples of salt, sugar and alum to beakers A, B and C. Stir to make clear solution.
Add soll, chalk powder and fine sand to beaker D. E and F. Stir for sometime.
Add a small amount of starch to the water and boil the content in beaker G. In beaker H, add egg albumin and stir vigorously.
Observe the mixture and record them.