activity show diffusion in liquid with the help of diagram
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Two test tubes are taken. To one 30 rim depth of chloroform and to the other 4 mm depth of water are added. Now to the first test tube 4 mm depth of water and to the other 30 mm depth of ether are added (both chloroform and ether form the upper layer).
Ether must be added carefully to avoid disturbance of water. The tubes are stoppered tightly with corks. The position of liquid layers in each test tube is marked and their thickness measured.
The tubes are set aside for some time and the thickness of the liquids in each test tube is recorded at different intervals.
Observation:
The rate of diffusion of ether is faster than that of chloroform into water as indicated by their respective volumes.
Inference:
The rate of diffusion is inversely proportional (approximately) to the square root of density of the substance. Substances having higher molecular weights show slower diffusion rates than those having lower molecular weights.
In the present experiment ether (C2H5-O-G2H5, J mol. wt. 74) diffuses faster into water than chloroform (CHCI3, mol. wt. 119.5). This ratio (74: 119-5) is known as diffusively or coefficient of diffusion.
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Ether must be added carefully to avoid disturbance of water. The tubes are stoppered tightly with corks. The position of liquid layers in each test tube is marked and their thickness measured.
The tubes are set aside for some time and the thickness of the liquids in each test tube is recorded at different intervals.
Observation:
The rate of diffusion of ether is faster than that of chloroform into water as indicated by their respective volumes.
Inference:
The rate of diffusion is inversely proportional (approximately) to the square root of density of the substance. Substances having higher molecular weights show slower diffusion rates than those having lower molecular weights.
In the present experiment ether (C2H5-O-G2H5, J mol. wt. 74) diffuses faster into water than chloroform (CHCI3, mol. wt. 119.5). This ratio (74: 119-5) is known as diffusively or coefficient of diffusion.
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