Object: To demonstrate the phenomenon of dialysis with the help of a collodion bag. Requirements: Collodion bag, starch, salt, thread, beakers, water, iodine, silver nitrate, collodion (cellulose nitrate dissolved in ether and alcohol). Method: (a) Preparation of collodion bag: 1. Pour a small amount of collodion in a wide mouthed, clean and dry tube. 2. Revolve the tube so that [...]
The below mentioned article includes a list of four simple experiments on osmosis. 1. Experiment to demonstrate the osmosis by using sheet of cellophane or goat bladder: Requirements: Beaker, thistle funnel, goat bladder or sheet of cellophane, thread, water and sugar solution. Method: 1. Cover the lower opening of the glass tube with the goat bladder or sheet of cellophane [...]
The below mentioned article includes a collection of six experiments that demonstrates the effect of pollution on seed germination. 1. Experiment to study the effect of polluted water on seed germination of any crop: Requirements: Polluted water, flask, distilled water, petri-dishes (7), blotting paper, seeds, and tap water. Method: 1. Take about one liter polluted water in a flask and [...]