process and methods for problem recognition and problem solutions

. Differential extraction becomes more effective if the process is repeated a number of times using a small volume of the organic solvent each time, than by using the whole solvent in one lot, i.e. multiple extraction is more efficient than single extraction. For example, iodine (I 2 ) ca..

In this method, the ore is treated chemically with a suitable reagent that preferentially dissolves the active component of the ore. The concentrated ore form is then recovered from the solution by a suitable chemical method. A typical example of ore concentration by ..

The process of electrorefining of metals involves the following steps: The electrolyte is usually an aqueous solution of the salt of the metal with some corresponding acid, if necessary. A thick block of impure metal is made the anode. A thin rod/sheet of pure metal is ..

The solution containing the suspended impurities is made to pass through the porous membrane such as filter paper, filter cloth etc. The solvent or solution containing dissolved substances passes through the porous membrane, which is called filtrate. The insoluble solid suspend..

A block of impure metal is made the anode of an electrolytic cell containing an aqueous solution of the metal salt A thin sheet of pure metal is made the cathode of the electrolytic cell When electric current of a suitable voltage is passed, metal ions from the electrolyte get dep..

The mixture to be separated is taken in a suitable solvent and the solution is poured on the top of the column of the adsorbent. It is allowed to pass slowly through it and as it passes through the column the different constituents of the mixture get adsorbed to different extent, forming..

. Lithium aluminium hydride (LiAlH 4 ) is a powerful reducing agent commonly used in organic synthesis. Sodium is used as a reagent to detect the presence of nitrogen, sulphur and halogens by Lassaigne's extract method. It is also used for the preparation of sodamide (NaNH 2 ), sodium per..

Methods of completing a square and to derive the formula for the solution of the quadratic equation. ..

, and from (iv) the general solution of q is determine..

. But at high temperatures these metals react with carbon to form carbides. Thus, these metals cannot be obtained by carbon-reduction process. The oxides of these metals, however can be reduced electrolytically. For example, the reduction of Al 2 O 3 to aluminium by electrolysis meth..