| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 4D50.00 | Diffusion & Osmosis | | |
| 4D50.10 | fragrant vapor - ethyl ketone | PIRA 500 | |
| 4D50.15 | diffusion model on the overhead | 27-7.4 | Balls of two different colors are initially separated by a Lucite bar on a vibrating table. Picture, Construction details in appendix, p.1295. |
| 4D50.20 | diffusion through porcelain | PIRA 1000 | |
| 4D50.20 | diffusion through porcelain | A-54 | Different gases are directed around an unglazed porcelain cup. A "J" tube manometer shows pressure. Diagram. |
| 4D50.20 | diffusion | Disc 16-09 | Methane and helium are diffused through a porous clay jar. A glass tube extending down into a jar of water bubbles as an indicator. |
| 4D50.21 | diffusion of CO2 | Hi-2 | When the porcelain cup is surrounded by CO2, water is sucked up the tube. |
| 4D50.22 | diffusion and hydrogen | Hi-1 | When hydrogen is trapped around a unglazed porcelain cup attached to a tube leading to a beaker of water, it bubbles out; when the trap is removed, water is sucked up the tube. |
| 4D50.30 | diffusion in a discharge tube | AJP 35(11),1026 | Mercury is collected in the refrigerated end of a discharge tube containing neon. When the cold end is warmed and ac is applied, the diffusion of mercury can be followed by the spectral change. Also works with a germicidal lamp. |
| 4D50.40 | diffusion and pressure | A-56 | Two 1 L round flasks are joined by a small tube. One is attached to a vacuum pump while the crystals are heated in the other. |
| 4D50.42 | diffusion of gases | Hi-3 | Hydrogen is allowed to diffuse down in a cylinder into air to form an explosive mixture. |
| 4D50.45 | bromine diffusion | PIRA 1000 | |
| 4D50.45 | diffusion of bromine | Hi-4 | Bromine diffuses out of a cylinder into air. |
| 4D50.45 | bromine diffusion | Disc 16-11 | Glass tubes containing bromine and bromine/air are cooled in liquid nitrogen and allowed to warm back up to show diffusion. |
| 4D50.46 | bromine diffusion | A-55 | A few drops of bromine are placed in cylinders containing hydrogen and air. |
| 4D50.47 | bromine diffusion | 27-9.1 | Break bromine ampules in air filled and evacuated tubes. |
| 4D50.50 | bromine cryophorus | PIRA 1000 | |
| 4D50.50 | bromine cryophorus | 4D50.50 | Three different bromine tubes: with air, partial vacuum, and vacuum, are cooled in liquid nitrogen and allowed to warm. |
| 4D50.50 | bromine cryophorous | Hj-9 | Tubes with bromine and air at different pressures are immersed in a cold trap to show different diffusion rates. |
| 4D50.55 | ether vapor before diffusion | 27-9.2 | Pour ether vapor from a wide mouth bottle into a large beaker suspended from a scale. Shadow projection shows an interface before diffusion starts. Picture. |
| 4D50.60 | diffusion in liquids - CuSO4 | PIRA 1000 | |
| 4D50.60 | diffusion of liquids - CuSo4 | Hi-5 | Concentrated CuSO4 and water diffuse in a cylinder. |
| 4D50.60 | diffusion of liquids | M-262 | A graduate 1/3 full of a saturated solution of copper sulfate and topped with water will show diffusion over time. |
| 4D50.60 | diffusion of liquids | M-263 | A tube 2m long with saturated copper sulfate at the bottom can be displayed for decades. |
| 4D50.62 | potassium permanganate in water | 17-6.2 | Drop potassium permanganate in a dish of water on the overhead projector. |
| 4D50.63 | dissolving crystals | 17-6.1 | How to introduce crystals of potassium chromate or copper sulfate to the bottom of a long tube of water. |
| 4D50.65 | diffusion pressure in a bottle | 17-6.3 | Carbon tetrachloride or lemon oil diffuses out of polystyrene bottles. |
| 4D50.70 | permeable membrane | PIRA 500 | |
| 4D50.70 | permeable membrane | 4D50.70 | Place a permeable membrane bag attached to a vertical tube and filled with a sugar solution in water. |
| 4D50.70 | permeable membrane | M-265 | Place a saturated solution of salt or sugar in a thistle tube capped with a permeable membrane and insert into water. |
| 4D50.71 | osmotic pressure | Hi-6 | Immerse a semipermeable membrane over a thistle tube in a CuSO4 solution. |
| 4D50.72 | osmosis | M-264 | Stick a glass tube into a carrot or beet and put the veggie in water. Water will rise in the tube over several days. |
| 4D50.73 | optical osmometer | M-266 | An optical lever shows bowing of a permeable membrane over the course of a lecture. |
| 4D50.74 | measurement of osmotic pressure | Hi-8 | Immerse a solution sealed in a semipermeable porcelain cup in pure water and read the pressure with a manometer. |
| 4D50.75 | preparation of semi-permeably membra | Hi-7 | On forming a copper ferricynide precipitate permeable to water but not dissolved substances. |
| 4D50.80 | osmosis simulator | PIRA 1000 | |
| 4D50.80 | osmosis simulator | 4D50.80 | A vibrating plate on an overhead has a barrier sized so only one of two diameter ball bearings will pass. |
| 4D50.80 | diffusion simulation | Disc 16-10 | A bar across the shaker frame on the overhead projector has a small hole that allows small but not larger balls to pass. |