laboratory apparatus and their uses

The apparatus used in this method consists of the following component..

In an experiment for verifying Boyle's law the following values of pressures and volumes for a given mass of dry gas at room temperature were observed and tabulated as shown in the tabl..

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 compounds like le..

By treating sodium sulphite or bisulphite with dilute sulphuric acid or hydrochloric acid - The apparatus is set up as shown in figure 7.1. Sodium sulphite or bisulphite is taken in a round bottom flask. Dilute sulphuric or hydrochloric acid is added through the dropping funnel and heated..

For use in the laboratory, ammonia is prepared by heating an ammonium salt with a strong base. It can also be prepared by reacting a metal nitride with water. All ammonium salts heated with alkali evolve ammonia. Ammonium nitrate is not used in laboratory..

Laboratory Preparation of Ammonia - For use in the laboratory, ammonia is prepared by heating an ammonium salt with a strong base. It can also be prepared by reacting a metal nitride with water. All ammonium salts heated with alkali evolve ammonia. Ammonium nitrate is ..

. Note: The following points should be remembered for the laboratory preparation of dihydrogen. Pure zinc is not used in the preparation of dihydrogen because its reaction with sulphuric acid is slow. The presence of some impurities increases the rate of reaction duel the format..

fig 3.13 - Berkley and Hartley's apparatus The apparatus consists of a strong steel vessel into which a porous pot is fitted. The walls of the porous pot are coated with copper ferrocyanide. Due to osmosis water moves into the steel vessel from the porous pot. The water lev..

1) Ammonium Sulphate is used as a fertiliser. 2) It is used in the preparation of alum. 3) It is used in the preparation of other ammonium salts. 4) It is used as a laboratory reage..

It has very low co-efficient of expansion and can withstand sudden changes in temperature. Therefore highly suitable for laboratory ware like flasks, beakers and oven proof cook ware..