laboratory scales

Air, free from moisture and carbon dioxide, is bubbled through boiling mercury. The oxygen of the air combines with the mercury to form mercuric oxide, which is a red solid (Fig.13.1)...

On a laboratory scale - Air, free from moisture and carbon dioxide, is bubbled through boiling mercury. The oxygen of the air combines with the mercury to form mercuric oxide, which is a red solid (Fig.13.1..

CuSO 4 (Copper Sulphate) - Copper sulphate is obtained as blue crystals in the laboratories. Hence on a large scale, it is prepared in crystalline form. Copper sulphate is obtained by passing air through mixture of copper and dilute sulphuric acid. This forms CuSO 4 solution. Th..

This balance consists of a beam and two scale pans (shown in figure below), the beam being balanced at its mid point on a knife-edge. The scale pans also hang on knife edges and rest on the base board. When the balance is not in use the beam rests on the beam support. A ..

Control of Ozone Depletion - Policy decisions are already taken in India to undertake technology developments for alternatives to CFCs. Two CSIR laboratories - National chemical laboratory and Indian Institute of Chemical technology are working on this. Along with this, paramete..

Interference of sound waves can be demonstrated using Quincke's tube. It consists of two U-tubes ABCDE and FGH, whose limbs can be inserted telescopically into each other. The tube ABCDE is provided with two side tubes at B and D. The side tube at D is fitted with a rubber tube. A tuning fork of hi..

BF 3 can be prepared by the following methods: By the action of HF on boron oxide or borax. On a large scale it can be prepared by the action of CaF 2 on boron oxide or borax in the presence of concentrated H 2 SO 4 . ..

. Tidal mills were used for hundreds of years in some of the European countries. Schematic view of Turbines Fixed at the Bottom of a Reservoir The first small wave-energy device was built in Japan by Yoshio Masuda. Hundreds of navigation buoys use his system in the Sea of Japan. The Japanese are al..

None of the group 13 elements reacts directly with hydrogen. However, a number of hydrides of these elements have been prepared by indirect methods. The boron hydrides are sometimes called boranes. The boranes can be classified with two series: (a) B n H n + 4 called nidoboranes (b) B n H n + ..