laboratory preparation of gas

Calcium carbonate is prepared in the laboratory by passing carbon dioxide gas into lime water. The resulting precipitate is filtered, washed and dried. The product obtained is known as precipitated chalk. Excess of carbon dioxide should be avoided since this leads..

Ethyne is prepared by the action of water on calcium carbide. The gas thus produced is collected by the downward displacement of wat..

In the laboratory, dihydrogen can be prepared by the action of dilute H 2 SO 4 on granulated zinc. Fig: 11.1 - Laboratory preparation of dihydrogen Granulated zinc is taken in a Woulfe's bottle. Dilute sulphuric acid is poured dropwise through a thist..

Any of the above mentioned methods could be used to prepare oxygen in the laboratory. Mercuric and silver oxides are not used for the preparation of oxygen, as they are very expensive. For the laboratory preparation of oxygen from any of the compoun..

Laboratory Preparation of Nitrogen - In the laboratory, nitrogen is prepared by heating a mixture of ammonium chloride and sodium nitrite and a small quantity of water. If ammonium nitrite is heated by itself it decomposes to produce nitrogen gas. H..

In the laboratory, nitrogen is prepared by heating a mixture of ammonium chloride and sodium nitrite and a small quantity of water. If ammonium nitrite is heated by itself it decomposes to produce nitrogen gas. However, this reaction is very fast and may prove to be ex..

The molecules of a gas are far apart. The inter-molecular force of attraction is negligible and they have no fixed freedom of motion. Hence gases have neither fixed shape nor volume. They completely occupy the container and take the shape and the volume of the container. Molecular st..

Helium - Neon Gas Laser - The figure shows the elements of a type of laser that is often found in student laboratories. The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neon. Helium is the "pumping" medium and neon is the "lasing" medium. T..

It is prepared in the laboratory by the action of iodine on ethyl alcohol or acetone, in the presence of alkali. This is called haloform reactio..

In laboratory, magnesium sulphate is prepared by dissolving magnesium, its oxide, hydroxide or carbonate in dilute sulphuric acid and evaporating the resulting solution, when colorless efflorescent crystals of the heptahydrate, MgSO 4 .7H 2 O, crystallize out. ..